My girlfriend used to believe that if she used the toilet downstairs in her house that rats would come up and bite her bum! A belief that eventually spread to all downstairs toilets.
Even to this day she will avoid using toliets that are downstairs.
A childhood belief about fear of

others believed things like this
- i thought that new disney peter pan song said "spread your legs" but its really "spread your wings"— shasta
- I used to believe that toliets ate you after you flushed themAnon
- My little brother was afraid of toliets cuz he thought monkeys would jump out of his butt.— ~~~ Crazy Bro ~~~
- I used to believe that if I sat on the toilet too long a snake would come up and bite me.— Cheesemonkey
- I used to believe that crocodiles lived in the toilet and would bite my butt when I had to go to the loo.— Oz
- When I was 8 I thought a spider lived in the toilet and would bite me if I sat on it.— Mike