i used to believe that everyone had the same private parts until they were 18 and that when a boy turned 18 the little flap of skin that you pee out of turned into a penis. i was so terrified that i was actually a boy and would grow a penis.
A childhood belief about rude bits

others believed things like this
- when I was little, about 4th grade, I thought that when a guy had an erection his penis turned colors...lmao— peanut
- I used to think that Frankie Avalon sang, "Hey Penis, Oh, penis..." instead of "Hey Venus."Anon
- I used to believe that gay sex involved a man sticking his penis inside another man's penis.Anon
- im a girl and i used to think my mom had a penis and i would eventually grow my ownAnon
- I used to believe that gay guys had sex by sticking their penis in the other's penis.— Fanbrat
- I used to be terrified of the numbers 18 and 19. I think I thought that when you turned 18 or 19, you die.— Emmy