Remember the "Mr. Bubble" commercials? I used to think that there really was a Mr. Bubble who would appear in your bathroom. Boy, was I disappointed.
A childhood belief about bathrooms

others believed things like this
- I used to believe that if I swallowed bubble gum, a bubble gum tree would grow inside of me. — Ryan
- I used to believe that the bubble gum medicine was really made of bubble gum. i believed this until i was 16.— Shawn
- I thought that "Doube Bubble Toil and Trouble" was "Doube Bubble, Toilet Trouble" Anon
- I used to believe that scars tasted like bubble gum— dani
- i used to believe that if i swallowed gum i would fart a bubble— jeremy
- I use to believe that if a sharp object punctured your eye it would pop like a bubble— Dani