My co-worker believed that one of the two testicles was actually at the head of the penis because they couldn't possibly both be at the bottom.
A childhood belief about general

others believed things like this
- i used to believe that the world couldn't have possibly started before i was born.— emma
- i thought getting circumcised was to get the head of the penis cut off— Dee
- When I was a year old, I believed if I hid my face, my mother couldn't see me because I couldn't see her.— kimberly dianne(:
- I used to think pee was in your testicles.— R.G.
- I used to think that Frankie Avalon sang, "Hey Penis, Oh, penis..." instead of "Hey Venus."Anon
- I used to believe that a penis was called a bobby because my mum told me... I believed this until I was 15.— Patricia