I used to believe in that there was a monster that lived under the toilet that my poop and if I didn't feed it regularly, it would eat me.
A childhood belief about general

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
- when I was little I used to believe the toilet was my dad's pet and if you didn't feed him, he would die.— fenyxfire
- I used to believe that when you went poop a monster would eat it— Confused till age 7 now 11
- I used to believe that 3 witches lived in my stomache and I ate to feed them.— Meara
- I used to believe that a little boy lived under my house and ate all the poop 'cuz he had nothing else to eat.— RockSorceress
- I used to belive that when I would poop I was feeding all the fishies that got flushed downthe toilet!— Fish Feeder