I used to believe that women had two vaginas. One for the baby to come out of and one to pee out of. The one that babies came out of was a small hole on the bottom of their stomach. I thought this because one day I asked my mum if babies are born through vaginas, and she said no (I assume she misheard me).
I even shared this newly-found fact with my younger cousins. I was astonished when I found they didn't have a second hole on their stomachs, so I told them "It must grow when you get older". My aunt wasn't very pleased.
A childhood belief about rude bits

others believed things like this
- I used to think that women had a secret door on their stomach that babies opened when they were bornAnon
- When I was very little I used to believe that when babies were born they came out of the mother's stomach.— Aerith
- My parents told me that babies were made from dimonds under cabbage patches, that would grow into a baby.Anon
- When I was a kid I thought girls peed out of there vaginas...woops!— Greg
- I believed that women who wanted babies ate a seed, which then grew into their baby. — World's Worst Scientist
- My Mom used to tell us that if you bit your fingernails, they would cut a hole in your stomach.— Linda B