I used to believe that your vagina and urinary tract were one in the same. I didn't understand how you could have your period for a week straight and be able to wee at the same time.
A childhood belief about periods

others believed things like this
- I used to think making straight A's in school was literally writing A's straight. Anon
- I thought that your period came out all at once and you had to wear a pad around the time it would come.— Sarah
- My mom told my sister that if she didn't eat her peas, her period would last for an entire month.— Maya
- I used to believe that if you left crumbs out for a long period of time, they would turn into ants.— Bylaberrie
- That you had to marry your sibling. During this period of time I devoliped a crush on my brother.— don't worry I'm a girl
- For many years I didn't understand why everyone was talking about the 'youth in Asia' (euthanasia).Anon