When I was little I saw the movie IT. I wouldn't go to the bathroom, or take a shower alone because I thought a clown would come through the water and eat me. Since then I've been afraid of clowns.
A childhood belief about clowns

others believed things like this
- When I was a child I used to be afraid of clowns because they used to have very big shoes— LIZA
- I used to think that if you go into a shower nothing can hurt you because you're protected by water — Foxxip
- that bathroom tap water was recycled "potty" water from the toliet. — livingdeadgirl
- I used to think when I peed in the shower as a kid, the water coming back through the showerhead was my pee.— gregg
- I used to think that trolls lived in my shower drain and showered with my dirty water— Troll bather
- I used to believe that if I flushed the toilet before I showered, I would take a shower in dirty toilet water.— Chris D