Why do people have periods?

Okay so people have periods because it's part of their body's way of getting ready to make a baby, even if they aren't going to have one. Your body is just always preparing, like a boss!

Every month, your uterus builds up a super soft and cozy lining, kind of like a tiny bed. This bed is full of blood and nutrients, and it's there just in case a fertilized egg (which could turn into a baby) decides to come and stay. If no egg shows up to snuggle into that cozy bed, your body is like "nope, not this month!" and then it sheds that lining. And that's what a period is, literally just your body cleaning house and getting rid of that extra lining.

Then, after your period is over, the whole process starts all over again! It's actually pretty cool when you think about it, your body is just doing its thing, on repeat, preparing for all the possibilities. It's a natural, normal part of growing up.