Until I was about ten or eleven, I was convinced that vampires lived behind the U-bend of our toilet, and that if I spent too long sitting on the loo that they would come up and attack me.
A childhood belief about fear of

others believed things like this
- I believed that if I swallowed my phlegm I would die. I spent hours spitting it out into the toilet.— chunky munky
- I used to believe that monsters lived in my toilet and they ate my poop and urine when i flushed the toilet.Anon
- I used to think you could get pregnant by sitting on a toilet seat.— Lisa
- I used to think that my dad was "smoking pot" when he would smoke his pipe while sitting on the toilet. Anon
- I used to be convinced that there were bald-headed beige aliens outside my toilet window.— Phil
- I used to believe that if I sat on the toilet too long a snake would come up and bite me.— Cheesemonkey