When I was little I thought that only little girls had nipples, and they went away when you grow up.
A childhood belief about rude bits

others believed things like this
- when i was about 4 or 5, i believed that if i pulled on my nipples, i'd grow up and have big boobs.
— JW - When I was little I thought girls had "man parts" as well, but it just took longer for them to grow.— person
- I thought nipples disappeared at a certain age because Barbie never had them.Anon
- When I was younger, I thought sex was two peolpe pressing their nipples together.— Katz
- I used to believe period blood came from the nipples. I thought that was what "padded bras" were for!!Anon
- When I was younger I thought I had made up the word "nipples" and "thinga-majigger" — Amelia