Do Women’s Menstrual Cycles Synchronize if They are in Close Proximity for Significant Time?

Do Women’s Menstrual Cycles Synchronize if They are in Close Proximity for Significant Time?


A woman’s menstrual cycle is counted from
the first day she begins menstrual bleeding until the first day of the next menstrual
bleeding. This cycle can vary from 21-35 days, although
the average is 28. It’s separated into 4 different phases-
the menses, follicular, ovulation, and luteal phases. The menses phase is when the woman is actually
bleeding. The average time frame of this bleeding is
3-5 days, though 2-7 is considered normal. It’s this phase people are paying attention
too when they talk about menstrual cycles synching up. They look at the first day of bleeding as
the start point. The follicular phase is where the follicles
in the ovaries begin to mature and form an egg. Simultaneously estrogen levels rise causing
the lining of the uterus to thicken. Ovulation then occurs which releases the egg
due to an increase in a hormone called the luteinizing hormone. The final phase is the luteal phase. The egg is released from the ovary and travels
down the fallopian tubes and in to the uterus. If the egg is fertilized and attaches to the
uterine wall, pregnancy begins. If not, estrogen and progesterone levels fall
causing the thickened lining in the uterus to shed and menses begins again. The entire process from the start of menses
to the beginning of the next menses is mediated by hormones. Because of the hormone mediation, proponents
of the synchronization theory claim that pheromones can affect hormone levels and thus, affect
the cycle. The theory began in 1971 when a psychology
student at Harvard (Martha McClintock) published a paper in “Nature” stating that women
who spend a lot of time together will tend to have their menstrual cycles synchronize
over time. She theorized that pheromones affected the
hormones of the women causing the synchronization. Pheromones affecting people in general is
an extremely controversial scientific topic in and of itself. It would take an entire article to do it justice
so I won’t be going into it here. That being said, in 1998, McClintock published
another paper in “Nature” which found that if a woman was exposed to cotton pads
soaked in the sweat of women in their follicular and luteal phases, the phases of their cycles
were significantly altered. The controversy lies in how you interpret
the data from McClintock’s, and others, studies. The differing lengths of cycle times combined
with a myriad of other things that affect cycles, causes the results to be simply a
matter of chance. One researcher, H Clyde Wilson, outlined three
serious errors involved in McClintock’s research. When you correct for these errors, the evidence
for synchronization evaporates. So why is this so complicated? Defining what exactly synchronization in cycles
is can be extremely difficult. While there are averages, most women tend
to have their own unique cycle that can be affected by many things. Suppose you have one woman who has a 28 day
cycle and one that has a 29 day cycle. If they both start menses at the same time
this month, they will be off by one day on the following cycle and then 2 days on the
one after that. Over time they will, once again, have a cycle
that will coincide with one another. To take it one step further, let’s say you
have women at both ends of the “normal” range for cycles. The first has a 21 day cycle and the other
has a 35 day cycle. If the women who has a 35 day cycle starts
on January 1st, and the women with a 21 day cycle starts on January 15th, both of their
cycles will start approximately at the same time the next month (February 4 and February
5 respectively). Those two women could say “Wow, we were
two weeks off last month and this month we have been spending a lot of time together
and look, our periods are synchronized!” Other things to consider when talking about
cycle periods is that each individual has different patterns of normal. Some have regular patterns, some have variable
patters, and others have regularly irregular patterns! Those same women can also experience different
cycle lengths and regularities depending on several environmental factors such as strenuous
exercise, puberty and menopause, low body fat, and extreme weight loss or gain have
all been shown to affect cycle lengths. Due to the fact that hormones regulate the
entire process, anything affecting hormone levels, will in turn, affect menstrual cycles. Simply interpreting the data and not being
cognizant to our “confirmation bias” (the tendency to search for or interpret information
in a way that confirms one’s preconceptions) can lead to errors in statistical analysis. Take for a specific example two subjects involved
in a study that started on July 1st. Subject A with a 28 day cycle starts her menses
on July 25th and then again on August 22nd. Subject B, with a 30 day cycle, has her onset
start on July 5th and then again on August 4th. If you believed in the “synchronization”
theory and were not aware of your confirmation bias, you could look at these numbers and
conclude their cycles were 20 days apart (July 25th and July 5th) in the beginning and are
now 18 days apart at the second onset (August 4 and August 22). Thus the subjects are probably synchronizing. The truth is, the opposite is actually true,
they are diverging not converging. Subject A would have had menses start on June
27th as well. Not looked at by this study starting on July
1st. That puts both subjects start as 8 days apart
in the beginning (June 27 and July 5). The second cycle being July 25th and August
4th makes them 10 days apart and diverging. The exact opposite of the original conclusion. So you can see from this how it would be easy
for a study on this subject, if not performed correctly, to provide very wrong conclusions
even without all the noise of things like regularly irregular periods and other factors
effecting hormone levels. The idea that synchronization is simply a
matter of chance has been replicated by several other studies since McClintock’s “groundbreaking”
conclusion in 1971. One of the most famous was done by Zhengwei
Yang, of North Sichuan Medical College in China, and Jeffrey Schank, of UC Davis in
2006. They found women living in groups did not
synchronize their cycles. They looked at and analyzed previous studies
claiming synchronization occurs. After correcting for statistical errors, they
showed those results were really at the level of chance. They went on to show that because of cycle
variability, they produce convergences and divergences in menses onsets and this explains
the perception of synchrony. In the end, Michael Shermer in the book Don’t
believe everything you think, said it best, “Smart people believe weird things because
they are skilled at defending beliefs they arrived at for non-smart reasons.” Whether you believe McClintock (the biggest
proponents of synchronization out there, starting back from her days as a student) and say that
your menses converging and diverging is a result of pheromones affecting your hormones,
or you take a step back and look at the main body of research that gives a non-pheromone
mediated reason for why the convergences and divergences happen, the result is the same. Due to the differences in female cycles, and
the environmental factors that can affect them, there will inevitably be certain times
when the women in your family will all be in their menses phase at the same time.

100 comments

  1. He spent a long time talking about confirmation bias, but didn't actually say the answer to the question is "no–cycles do not sync up." I would be very surprised if this is really the case because that is an awful lot of confirmation bias. Like, every woman who has ever had roommates seems pretty confident in saying that cycles DO sync up.

  2. I'm curious about something. Where did the tradition of getting down on one knee to propose start, and what is the history behind it?

  3. Yeah, I like how you think it's okay to mansplain how our tiny little woman brains can't handle science… Today I found out this channel is awful.

  4. I think it's inevitable. No matter what when you move in with female roommates you inevitably converge due to different cycle lengths and it gets talked about etc. You don't pay attention if you later diverge. Or you assume it's because you've spent less time together or been influenced by women at work or uni etc.

  5. Hello, is it ture people with blue eyes have a higher tolorence to alcohol? do people with ginger hair need more anaesthesia than average to be put to sleep? can Simon Whistler whistle?

  6. A quick search showed that just about all mammals apparently have menstrual cycles, something I've been curious about, as it's hardly ever mentioned in documentaries and such. It seems that overt menstruation, however, is restricted to humans and some close primate relatives. How did this approach ever evolve, I wonder, and is there an evolutionary benefit to/reason behind it?

  7. It doesn’t matter how long a woman’s cycle, once she spends time living with other woman, her cycle will sync with the cycle of the group, even if she jumps a week to link with the other women. It’s not uncommon for this to happen within the first cycle she experiences with the group. Before a vacation together, a cruise, a group of six of us camped at a friends house for a month to sync our cycles before the cruise. It worked

  8. And yet I’m still here wondering why there was a certain week each month when all the bins in my girls boarding school were full of used tampons or pads….

  9. Love this one! I'm active duty military, and the evidence has always been close but not perfect synchronization. Thank you

  10. ive lived with multiple women n yeah comfy pants and group ice cream pitty parties happened every month. knew wiccans who synced with the lunar cycles as well🍻

  11. From personal experience they don’t sync up to like the same day but maybe a week or a few days over lapping over time and that’s the same case for many women. For example two of my friends have their periods within two or three days of each other and usually I get mine during the last few days of theirs but usually we all on our periods for a certain period of time no pun intended.

  12. I don't know how anyone can believe in this crap in the first place… surely all girls raised by women girls would inherit their cycles while teenagers if there were any truth to this. I also don't know why 80% of women like the idea I am definitely in the 20%

  13. I have been working as a cleaner at many different workplaces. Usually, you have 1-2 weeks when you have to empty the little bins with discarded feminine napkins daily, followed by 2-4 weeks where you don't have to empty them at all. When cleaning places with 50-60 women working, it means several discarded feminine products in many different sanitary-bins during the "red weaks", followed by weeks with no discarded feminine products at all (it can mean more than half an hour less work in places with many toilets and women). I find it unlikely that this happens by pure chance as months go by. Add to that, that when new women/a new woman start working at those same places, there is often a small number of discarded femine products during the "lazy periods", making them less lazy from the cleaners perspective, when there was none before, but that disruption only last a few of months.

    It might not be other womens pheromones that cause this phenomena, but something does. Why couldn't it be caused by years spending most of the awake time in a similar environment (experiencing the same stressful and calm periods, eating the same food, meeting the same people at the same times (including attractive males, which has been proven to have an impact on womens hormone levels) etc)?

    Also, when one women get pregnant leave in a workplace, with many women working, it usually means the beginning of a month where a few more women get pregnant leaves, which means they got impregnated at roughly the same time, by their respective male partners, at different locations. Then a year or so later, after the first batch of babies have been born, occure a new, much longer, period of even more pregnant leaves, but I'm guessing that last phenomena, has more to do with women wanting babies of their own, when seeing other people's babies.

  14. I've always had a theory that it would benefit animals if females in a social "pack" had periods in sync. Afterall, blood can easily attract predators. Why wouldn't evolution encourage the bleed time to sync and reduce the time where any number of females in the pack are bleeding?
    It's a theory… but we'll have to prove syncing happens at all first.

  15. I use to bleed twice a month/21 day cycle, until I started on the pill, so I would “sync” up with my friends a lot. When mine became regular, I noticed how irregular everyone else was and how we seemed to alternate on who bled which week rather than bleed together.

  16. I have a question. (unrelated to vid). Where did the saying "might as well have been speaking Greek" come from? As in reference to not understanding technical terms or complicated subjects. Why is Greek singled out? Is it really that hard a language to understand?

  17. OMG! how much does one person have to say about periods …. let alone being able to deliver the discussion so seriously

  18. Not only do women's cycle's sync, but they also sync around the alpha female. I am an alpha female, and coworkers would complain that their cycle was changing when I would come to a new job. It never failed. Thank God I don't have to deal with that anymore.

  19. My friend and I were never on 28 day cycles until we moved in with 4 other girls in a suite. We started getting cramps a week before we were supposed to have our periods. Within a couple months, we were having 28 day cycles at the same time (turns out the whole suite was synchronized). When a new girl moved in, she started having cramps a week before her period was due and eventually ended up with the same 28 day cycle that everyone else was on. It was weird. I don't think science has looked into it thoroughly because women's health issues, especially surrounding reproductive organs, usually get the backseat in research or are considered a taboo topic. Absence of evidence is not evidence of absence.

  20. How does the women's body keep time? Does the body get the time from the conscious mind? If it does then do an experiment where a woman is deprived of knowing the time or date for like 100 days strait. If the menstrual cycle starts like clockwork then there's something else in play.

  21. I feel like this is just a case of not enough investigation. When I used to have periods every woman I lived with ended up syncing with me consistently, every month.

  22. Short answer before watching- yes.
    I recently transferred locations where I work. My cycle was at the same time as all the girls I previously worked with, but now that I'm at a new location, my cycle has changed to be a little later in the month and all the girls I work with now are on the same cycle. I'm pretty sure it goes back to the mating seasons of the cave times.

  23. I've no idea why but even though my cat is spayed whenever my dog has it's time of the month the cat becomes incredibly affectionate as if it were having its as well

  24. I have found that every woman I have lived with we always ended up having our period at the same time. Even though we started out not having a period at the same time. But after a few months and kept getting it at the same time every month after that.

  25. I have weird breakthrough bleeding when I am around my sister-in-law when she is having a period. My periods themselves are very irregular and I've gone 60 days without a period.

    I think the fact that women have experienced this…and it's not just a matter of days matching up b/c eventually a 21 day-er and a 29 day-er matching once in a while is valid and being completely ignored and written off by men. So. Fuck you. When I was nursing a child, I typically experienced amenorrhea. Through 3 kids I had this. Then with the 3rd, I started working at a place with a woman that had these crazy hormone swings during PMS and I would have breakthrough spotting. It was the ONLY time in 5 years that I bled while nursing (I didn't nurse for 5 years straight, that's combined). I quit that job after 8 months and I stopped having the spotting for another year…when I actually quit nursing that child.

    When I have experienced "cycle synch" I actively bleed at times I SHOULD NOT be getting my period. It's not instant, it's usually within a day, though. When I have been around a lot of women my periods also become more regular…and even if we're not synched I can expect to get a period every month when I'm spending a lot of time with other women. My husband was in the military so he was often gone and to pass the time I spent more time with friends, my female relatives often came to visit, etc.

    Not sorry. This is totally real and I think the reasons put forth here for why it isn't is trying to erase the experiences of women.

  26. Am I the only one who got startled for a moment at the picture of the pad with a red feather? I'm so used to seeing menstrual blood represented by blue liquid in commercials that it honestly surprised me for a momet. Well done stupid commercials and kudos to whoever made the picture.

  27. Has there been any studies around women with regular periods? I do and I will 'cause' my BFF, who was a really long cycle, some what irregular, to start…

  28. There are other symptoms of this phenomenon. More than just 'calendar' tracking and the syncing of 'days'. Its more about the syncing of dates and the whole cycle and not just when we bleed

  29. I have 3 sisters & I’m a woman to. We NEVER synched up when I was living at home. I’ve been on the pill for 8 years & I have my periods with the sugar pills & it never lines up with any other woman in my life ever, even my roommate

  30. the funny part: you would not have to believe in such stupid shit, if you were just opened about your periods. It is not a matter of believe, it is a simple fact. and every women ever could prove this theory wrong. but nah, shame is all we got. and the best marker of it – we have no culture of non-mysogynic jokes. you just can't start a coversation with that kind of joke and move on. i repeat: not with a mysogynic hate speach like "oh, darling, you are so angry today, must be on your periods!".
    so, I can relate. when you are asked about your job, like, is it horrible to work with only women, y'know, your cycles are synchronize and ya"ll become crazy. no, I don't actually know.
    the problem is not a myth itself, althrough it is problematic. the problem is: nobody cares, how this myth affects you. and it's dangerous, I am telling you.

  31. I have to slightly disagree with this. As someone who's worked decades in retail (with mostly women), I would say a decent amount of women tend to start to cycle together. My personal experience would lean towards this as when I got a new management team member (i.e. someone I would spend a LOT of time with) my cycle would lengthen and shorten as per their cycle. After months of working together our cycles would become closer and closer together (although not necessarily the same). I agree that it's not an overall conclusion, but I don't think it's a total myth either.

  32. This is strange to me because I have very high prolactin and usually have my period every 3-4 months or so. However, at around my 1 month mark my friend had her period and I was around her for a few days. My period came two days later and was my first normalish period in over a year (only two weeks late). I was amazed and could only assume something was triggered. It could of just bern luck of course. My prolactin did not lower by the way.

  33. You should do a video on how with proper use of birth control, not taking the placebos, women don't need to have a menstrual cycle.

  34. First off, Bravo for being willing to tackle the topic. Taking on bizarre topics no one else will touch is why I come here. But…
    The idea that that medical science has seriously studied this when… well they are never very concerned with studying women's health in general and definitely not women's sexual health seems slightly weird in and of itself. So, (*shrug*) it's not syncing because of pheromones, but as you pointed out, other environmental factors can affect them, like not only living in the same space but also the same diet and other environmental stressors in their daily lives, like, say, in a family unit. Syncing every once in a while can be explained but does not even remotely explain women in the same family having pms EVERY month at the same time.
    It also doesn't explain the situation a former friend had – she was part of a tour group for a year of about a dozen or more people, half of which were female. On a lark, the girls decided to put the theory to the test and so put all their cycles together on the calendar (they found it very embarrassing when, after a few months, the male members of the group realized what the calendar stuff meant). They found that, over the course of a few months, their cycles did start to move closer together and stayed together. Now, I'm not trying to say why that happened, it could be that the shared rigors of performances, having the same daily schedules and eating similar meals is the reason. Who knows? All I'm saying is that stating stats about how 2 women syncing up and then drifting apart could statistically happen doesn't explain how 7 different women's cycles synced up and stayed synced.
    Now, maybe this is all one big coincidence but… given the medical community's tendency to treat all women as if they have Munchausen syndrome ("those silly hysterical females" *eyeroll*) and the fact that the research presented doesn't really do anything other prove that syncing is not caused by something as simply as "pheromones" (not specifically what the title of the video claims to deal with), I'm afraid your video doesn't so much disprove the belief as simply scoff at "things some people believe" in a very slightly dismissive way (although I hate these types of things, I am ashamed to admit the term “mansplaining” is what came to mind).
    There is still so much about the shift in hormone levels that we don't know. Heck, given medical science still doesn't understand fully how men end up with Postpartum depression when their bodies have not been the ones to go through physiological changes, I doubt that we can be so dismissive of this issue. http://theconversation.com/postpartum-depression-can-affect-dads-and-their-hormones-may-be-to-blame-81310

  35. From personal experience, I have to disagree, up to a point. I have 5 older sisters and we all have experienced it at some point. However, to the point of the video, although there is a shift, the shift is sometimes not very strong and can correct itself. I think some women are more influential in their menses than others, as well as close quarters being subjective. Close quarters for us was sharing a one bedroom apartment, in summer where nobody is leaving the house, and sleeping in the same bed/room. And something to take into account is the changes that people make in their day to day lives (i.e. exercise, diet, or an out of the house hobby), and how that can affect the cycle of some women. All I can state for certain is that living in close quarters with a different women can affect the timing of a menstrual cycle, depending on how influential their pheromones and how close contact is; it can lead to synchronization, but not always.

  36. Everyone has different cycles and can have it sync at some point, but it doesn't stay synced.

    Usually, I just have 6 days worth but I often skip months altogether or have 2 week long periods every now again sometimes. It's all over the place, yet many times when I bring it up with family or friends we always happen to 'sync' but it's just chance partially from my erratic cycle. Lol

  37. Yes they do….I worked in a jail for a bit and you never go into female pod during that time. Smells like a fish factory and the girls are vicious. Just saying….

  38. This is pretty much Mansplainin'. This fact is effect has been the practical experience of countless women throughout history. I've known dozens of women who's cycles changed because of long term exposure to other women's cycles. Heck, look at women's prisons, almost every woman there hits her bleeding near the same time.

  39. You're not a women you don't know anything. I have irregular periods due to pcos, so getting my period is important due to blowing and other things that comes with irregular periods. So what I started doing was hanging out with my co-workers if they were on their periods and my period would come I noticed this so I kept doing it to purposely get my period. It worked, and not only did it work I would also sink with they're period schedule. I moved in with 2 females and now I get my period all the time more often then when I was alone, and is also sinc. So perhaps the studies are wrong. So maybe you have to have some type of connection with the women your sinking with. For example I would sink up with my best friend all the time growing up. And maybe some females are easier to sinc with or one can be the domanant sinc-er and some are just sinc-ers. Like me I'm a sinc-er. If you base your studies on a group of females that are all domanant then the study is wrong

  40. My ex stopped getting her period after she moved in with my family. My mother had already gone through menopause. After she moved out she started getting periods again

  41. "80% of women believe this"….are you actually serious? Is this a joke? Because call me naive, but I thought most people had more than one brain cell. I (a woman) heard this myth referenced very few times (most notably in The IT Crowd) and assumed it was some ridiculous superstition-type thing widely regarded as ABSURD, on the level of how people used to believe women's emotions were tied to the travelling uterus moving through her body (hence the word "hysterical", coined as a term for women who were unsatisfied with being docile helpless babymakers & housekeepers). You mean to tell me people are actually still debating this? When it takes 2 seconds of thought to realize that women with differing cycles are bound to eventually coincide one month just by chance? If two men fart at the same time, are they synchronized too? Is humanity really this stupid?

  42. Wow, how patronizing! How do you manage to think that women can't understand that things can happen at the same time as a coincidence?! How is explaining this half the video?

    Did you actually talk to any women who have experienced this to make this video?

    Let me help you out. I used to be able to take my pills back to back and skip periods. I would have a period every few months and it would be super light, unlike my unregulated periods which are super heavy and painful. In the last several years this stopped working. I would breakthrough bleed midpack, and I couldn't skip a period. When I did have a period it was not the short, light period I'd gotten used to. Since the fall my periods have gone back to what they had been. I've been able to take packs back to back again.

    No I didn't switch to a stronger hormone as my doctor suggested I may have to do. So what changed?

    My daughter moved out for university.

    Those times I was breakthrough bleeding even while on the pill? Yeah, that's when she was having her period.

    So no, I'm not reading into a one off coincidence. We've both triggered each other to have bleeding out of cycle. I watched this hoping there might have been some insight on the current medical theories, not a lecture on how a broken clock is right twice a day.

  43. It is an easy subject to debunk. I guess it harkens back to certain animals coming in to season and I'm sad a female proposed it.

  44. If synchronization is by chance then all the women ive lived with (my siblings and mother) and myself should play the lottery cause there's a lot of chance going around

  45. Maybe don't quote Shermer in a video about something affecting mostly women. Bit in bad taste considering his history with them.

  46. real quick, if you admit that hormonal and situation things can vary a woman's period then regardless of the errors in that havard gals study you cannot say that women dont sync even somewhat. all you can say is that that womans study was wrong. so who t f wrote this. [maybe i can only say this because i dont get how can you say a woman who has a 28 day cycle and a woman who has a 30 day cycle when, A how is that not ridiculous and B you admit that women's cycles vary. so lets stop talking about objective day long cycles after you admit they vary in a given woman.]

  47. Thank you for the mature and humane presentation of the subject (including the red liquid on the pad instead of the blue like in the commercials). Thank you. I don't know how to put it into better words (I'm sick and headachy), but I feel like this is what this world needs. Grown-up conversation without segmentation of "female topics" and "inoffensive" illustrations. You're great, Simon and the team!

  48. Most women don’t have an x day cycle. It varies by a day here and there. The qualitative data of women having lasting sync can’t be disregarded. I feel this is a case of over complicating the scientific research, when it may be viewed as a generalization by the women it affects.

  49. Yes, in my experience, of all the women I've ever lived with, every single one of us has had our periods sync up. I'm not talking about the complete cycle, but the bleeding period. My theory is it's to do with the pheromones.

  50. You can't give a cute little pet name to something that transforms women into a feral pack of fear, suffering and pain inducing rage-beasts. It's like calling a thermonuclear bomb a nukey dukey or something.

  51. I wonder if genetics affect the length and timing of one's cycle? If so, family members might have similar patterns and seem as though they were "synced" when in reality it's genes. Likewise, diet and exercise affect menses and those living together are maybe more likely to have similar lifestyles.

  52. I just think a lot of women's sink up because it seems that our cycles are tied to the phases of the moon. Hence, more children during a full moon. Ask any o.b. nurse and they will confirm it.

  53. I would say it does since I`ve been around women relatively closely and they do seem to all cycle at around the same time with sometimes the odd exception who would bemoan her isolated fate.

  54. Mistake at 7:07, Michael Schermer didn't write the book Don't Believe Everything You Think, Thomas E. Kida did, unless Schermer has a quote in said book. Please do more than the bare minimum in providing sources if you want to claim to be scientific.

  55. When I went to college, all of the women on our floor synchronized, those of the women on the floor below us synchronized a week behind us and those of the first floor were a week behind those…consistently. Just because science hasn't proven it yet doesn't mean it doesn't happen…especially when it comes to anything involving the female body.

  56. Having spent a lotta time around girls and ladies I have seen when some spend more than 4 to 5 months hanging out together a lot they synced, I don't try to make sense of it even being into science, it comes down to pragmatism though, if these ladies will be over your place a lot and your GF buy a certain pad and etc, you learn to just buy extras cause their friends will need such stuff while they're visiting, best to buy more chocolate stuff and so on and realize you're male and you're mortal and you have sensitive stuff externally that ladies will target first if you piss em off. Some things come down to social survival skills and being a guy, I learned feminine products usually have a flap or side w all the important data, you take that to the store, get a girl or lady to help and they'll make sure you get the right stuff, if you don't want to be sent back out, you get it right the first time and bring back chocolate, Hershey's or whatever ! If a blizzard or hurricane is due, buy extra, if you're sent out for one box, buy 2, if there's a larger quantity box, buy that, trust me, this is how guys survive or your GF will make sure everyone knows when you screw up. We're guys, we're already guilty of stuff, even if we didn't do it, we're guilty of something. Some things w girls and women will never be understood, get used to it, better off trying to understand cats, impossible as well. Just make the relationship as smooth as possible, or learn the details of ritual suicide, prob on youtube somewhere. If your GF is Japanese and you've screwed up bad and she hands you a knife, even if she's not serious, it means you might as well commit seppuku aka Japanese ritual suicide. You're gonna wanna buy more chocolate and flowers !!

  57. women do not sync up I have three daughters and three weeks out of a month I have to deal with a psychotic, bleeding, lunatic one week at a time. one starts as she ends the next one starts, when she is about to end the last starts. its fucking maddening, I got pallets of midal and tampons and pads with fucking wings. fuck syncing up I wish they would!!!

  58. Ehh no…they don't eventually sync up over months of time. Within even 2 months me or the other female will have our period be really* late and we start synching.

  59. "Use the blue liquid! That's always been the deal, you can show whatever you want but you use the blue liquid!"
    Stewie Griffin

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