When I was 4 or 5, I didn't know what the little door in the wall of the basement was for (plumbing access for a wet bar). My older brothers told me there were scary rabid monkeys living in there. It kept me out of their room when they weren't there
A childhood belief about basements

others believed things like this
- a friend of my little sister's had 4 older brothers, so she thought that when you got older you grew a penis!Anon
- My mum told my older brother that dogs weren't allowed in London.— Fiz
- I used to believe the living room furniture would party after we all went to sleep.— Ellen
- I used to believe hat the news readers could see into my living room so i sed to undress behind the couch.— henri
- I once believed that the walls and ceilings were completely jam packed with plumbing and wiring.— David
- I used to think that 'Child Locking' only worked on children and that older people could still open the door.— Anonymous Whistleblower