I used to believe that boys had boy babies, and girls had girl babies.
That was when I was 3-7. I'm 15 now.
A childhood belief about reproduction

others believed things like this
- I used to believe all babies came out as girls and later on in life some of those girls turned into boys — Tom
- When I was a little girl, I believed that all cats were girls and all dogs were boys. :)— Mary Ellen
- I used to believe that birth control was for deciding to have either a boy or girl babies. Anon
- My neighbor girl told me that "crazy men can have babies"— Russ
- When I was a little girl, I thought all babies came from 'China' (a Vagina)— Lainie
- I used to belief that babies came from babies r us.— Honey