I used to believe that aligators lived in the sewers and after we flushed the toilets they would eat it. I was always quick to get off the toilet in case an aligator decided to come up through it!
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 believe that little people lived in the toilets. and that they could eat anything and everything. — bob the pinecreek
- I believed alligators lived in toilets, and one apparently got hold of my sister.Anon
- I used to think that in public toilets, the cleaning lady actually lived in the supply cupboard.Anon