I used to believe that just like guys getting erections girls asses would get all hard. I don't know why, but I belived it.
A childhood belief about rude bits

others believed things like this
- I used to believe that cats were the girls and dogs were the guys. Same with cows and horses.Anon
- I used to think that boy's lifted the toilet seat to pee because their asses were too big.— sydo
- My dad told my young daughters that molasses comes from mole asses. I don't know how long they— Monica
- When I was a little kid, I believed that erections were caused by the need to urinate.Anon
- 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