I used to believe that the sizes of the beds were jack, queen, king and ace. jack being the smallest (like a twin bed) and ace being the biggest.
A childhood belief about around the house

others believed things like this
- I used to believe that Africa was the biggest country and Luxembourg was the smallest.Anon
- "She's got the Jack" by ACDC was "She's got the Clap".— Cybela
- I thought Jack was a nickname for Jackery ( like Zack and Zachary).— Bootlebat
- I used to believe that tornadoes were spinning jack-o-lanterns in the air bent on destroying my house.Anon
- Since the girls name Jackie is short for Jacqueline, I thought the boys name Jack was short for JackalAnon
- I used to belive that Jack Frost was a real man! and that he came and painted frost on the windows at night.— Tom