I used to think that after a girl is born, the doctor cuts her between the legs to find the opening of the vagina. (I am female).
A childhood belief about rude bits

others believed things like this
- I used to think a female daddy-long-legs was called a "mummy-long-legs".Anon
- When I was a little girl, I thought all babies came from 'China' (a Vagina)— Lainie
- I used to believe that sex was when a boy and a girl would lie on their sides and hump each others legs.— Debbie
- when i was little i always asked my mom if my aunt had ant legs or people legs.— kelly
- I used to think that to desex an animal meant to turn it from a male to a female or female to male.— Phil
- I used to believe all dogs were male and all cats were female. I still call dogs "boy" and cats "girl." — Kelly F.