My brother and sister told me that it lived a man/monster named "Arnold-under-badekaret" under our bathtub- and I of course believed them!
A childhood belief about bathrooms

others believed things like this
- I used to belive that my mum and dad lived together cause they were brother and sister— Corin
- The boy in my class named "Sahand" must have a sister named "Safoot".Anon
- I used to believe that their was a toilet monster named johny.— sexyallie_69
- I believed alligators lived in toilets, and one apparently got hold of my sister.Anon
- First I believed that my parents were brother and sister. Then I thought that my dad was also my mums dad. — Rainbow
- My sister told me that Fraggles lived in our basement. I used to sit down there forever so I could see them. — Suzie