I used to believe that boys and girls had the same parts under their clothes...until I saw my brother come out of the shower. I was confused for months.
A childhood belief about rude bits

others believed things like this
- I believe that it would rain when God would be having a shower or washing his clothes.— Karina
- I thought that the difference between girls and boys was that girls have teeth.
Anon - 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 little I thought girls had "man parts" as well, but it just took longer for them to grow.— person
- I used to believe that boys, gave birth to boys and girls gave birth to girls. How i'm so wrong now.— Sarah
- I used to believe that little boys grew up to be girls and little girls grew up to be boys. — Darin