I used to believe both boys and girls had penises so i thought sex was when they tied them together.
A childhood belief about sex

others believed things like this
- I thought that the difference between girls and boys was that girls have teeth.
Anon - I used to think that hot dogs were made from boys' penises.— never eating hot dogs again
- When I was about six, I believed that boys had buttons on their penises--one for pee and the other for poop.Anon
- I used to believe all babies came out as girls and later on in life some of those girls turned into boys — Tom
- I always thought when I was a kid that Milo is for boys and that milk are for girls. . . — Cathyia
- i thought cats were girls and dogs were boys. Anon