I used to believe that any room with the sign PRIVATE on it was full of private parts. Even though I wasn't too sure what they would look like, all strung up with no people attached to them.
A childhood belief about rude bits

others believed things like this
- When I was a child, I used to believe that armpits were private parts— Duda Gueiros
- When I was younger I was certain my "private" was called a ba-china... the boy's were pickles. — taliba
- When I was a kid, I wondered why they called it "public hair" when it was so private.Anon
- I thought there were only four ranks in the army: private, corporal, Seargeant, and General— Alberto Richardson
- I thought when Grandma's hens were cackling, they were giggling about some private joke in the henhouse. — Not a farm kid
- Before I went to a planetarium for the first time, I thought it was just a room full of plants. Anon