I used to believe your glans can fall of your penis when you pull down the foreskin (I'm not circumsized).
A childhood belief about rude bits

others believed things like this
- i used to believe that i needed to have sex before i was 15 or else my penis would fall off— jarid
- I used to believe that circuncision was a natural process and that the foreskin fell off during puberty.— Yure
- I used to think that Frankie Avalon sang, "Hey Penis, Oh, penis..." instead of "Hey Venus."Anon
- I used to believe that gay sex involved a man sticking his penis inside another man's penis.Anon
- I used to believe that gay guys had sex by sticking their penis in the other's penis.— Fanbrat
- I thought if you trip and fall down you fall at the speed of light!— Dietrich Corby