I thought that males had two penises, one for peeing and one for sex. The reason is, I didn't know about testicles, and I could see something hanging behind there in the Leonardo Da Vinci drawing and on the Tarot card with the nude man, so I thought that was the other one.
A childhood belief about sex

others believed things like this
- When I was younger I thought Leonardo Di Caprio and Leonardo Da Vinci were the same personAnon
- When I was younger I thought men had two penises, one for peeing and one for having sex.Anon
- I thought a Debit card was actually called a Debt card.— Kilgore
- When I was a kid I thought babies where made when people hold hands and kissed nude...— Ryan
- I used to think Leonardo DaVinci and Pablo Picasso lived around the same time— Vova
- I thought that all cats were the females, and that the dogs were the males.— opps guess not