....Uterus wants baby.
Person doesn't have baby.
Uterus wants revenge

when us ladies bleed out of our vaginas on a monthly basis. it lasts about a week on average and may cause you to sit at an awkward angle when you're in school.
causes horrid cramps for most girls.
when you hang out with people enough, supposedly you all menstruate at the same time. this is when the crime rate goes up in your neighborhood/area.

Flawed.

Once a girl reaches puberty, these hormones take over and she starts to have boobs, curves, and becomes more emotional and feminine etc. These hormones also enlarge her hips and uterus. This lining builds up in the uterus and sheds itself every 28 days if she doesn't get knocked up, thus she gets her period.

People tell me, "Well we have periods because we're supposed to have babies!" But even if this were true, I read this study that a woman ovulates 400 eggs in her lifetime. Who could actually have 400 kids? Even in the old days when they had like 12 kids and they only lived to be like 60, a woman would still have more periods and pain than she would kids.

Now it's the 2000s and nobody has 12 kids anymore, some people don't even like or want kids, but we're still stuck with periods and the average age of menarche is declining due to all the calories and stress. As a result, we've suffered too much from periods: we miss school, lose blood, have cramps, waste money buying "feminine hygiene" products, and basically go through a lot more than the guys do.

Something boys complain about but they should not cause they don't have to have the extreme pain for a week a month.

A monthly cycle every girl goes through, which can sometimes cause, cramps, bloating, fatigue.

1. A period of pure agony for a female, lasting way too long. Signs of this state include screaming at anything that moves, rolling around on the couch in pain, and spending hours with cold water and stain remover.
2. A useful thing that ends a scentence, that does not exist for most l337 people.

Something I somewhat enjoy getting every month because its my body's way of letting me know I haven't gotten knocked up.