I was already confused about periods when I got to about the hymen layer in women it added to my confusion.I knew women had separate holes for peeing and sex but didn't understand if the vagina was covered with hymen layer then how would a women go through periods? From where would the blood come out if the vagina was covered! And I presumed women bled from peeing holes ;)
A childhood belief about periods

others believed things like this
- i used to believe that women wore bras because their periods happened in their boobies.Anon
- a male friend of mine used to think that only women who had been pregnant had periods— oiman
- i used to believe that women peed out of their arse and pooed out of their vagina— TIM wilson
- I thought pads sucked blood from women. It wasn't until later in life that I knew their actual purposeAnon
- When I first met my husband, he thought women didn't fart. He was really surprised after he met me!!!Anon
- In varsity I went out with a guy who thought a hymen was an animal, that as related to a Hyena. I magine that!Anon