i used to think that the umbilical cord was attached to the penis so the size of your penis depended on where the cors was cut.
A childhood belief about rude bits

others believed things like this
- 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
- I used to believe that babies were attached to the umbilicle cord and then stuffed down the throat grow.— anonomous
- I used to believe that gay guys had sex by sticking their penis in the other's penis.— Fanbrat
- I used to think that men's poo came out of their penis' like wee.— Helen
- I used to think that I was the only person to have a penis!Anon