I thought that the difference between girls and boys was that girls have teeth.
A childhood belief about appearance

others believed things like this
- 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
- I always thought cats were all girls & dogs were all boys ... I have no idea why.Anon
- I used to believe that little boys grew up to be girls and little girls grew up to be boys. — Darin
- when I was a kid, I used to believe that only girls could be my friends and all other boys were my brothers.
— rajat - I used to believe that tigers were girls and lions were boys— Ruth