I grew up with sisters and never saw a penis. I did hear about "balls" though. I thought the penis was made up of these balls, like a snowman!
A childhood belief about rude bits

others believed things like this
- I used to think that girls had "balls" and not boys, and the "balls" were slang for breastsAnon
- i always thought it was Grape Balls of Fire instead of Great Balls of Fire— Courtney
- I also thought that meat balls were made from testicals— Glenn
- I used to believe that the clouds were made of cotton balls— Jeannie
- 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