I used to believe that if someone peed in the toilet and didn't flush it, then you peed in the same toilet, the two kinds of pee would mix and create a horrible toilet monster that would try to eat you.
A childhood belief about weeing and pooing

others believed things like this
- I was scared that if I peed too much, the toilet would flood— scarlett
- I used to beleve when i was 4 that the flush on the toilet was to wake up toilet monsters.— Millie
- I thought that toilet paper was bread and by puting it it the toilet i was feeding the ducks at the bottem.— Gringo
- 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