I belived there was a monster that lived in the toilet bowl and when you flushed the toilet and night you woke him up and you had to run out of the bathroom quickly or he would get you!
A childhood belief about fear of

others believed things like this
- 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 believe that if I flushed the toilet before I showered, I would take a shower in dirty toilet water.— Chris D
- I used to think if I left the toilet seat open my cat would get flushed down the toilet.— G
- i used to be scared to use the bathroom becuase i believed something lived in the toilet.— robert allen freeman the fourth
- I used to believe that toilet seats were for kids only and that adults sat directly on the bowl. — Evan Klyne
- I used to believe that the toilet would suck me down if I flushed it.— :-)