When I was little there was a TV commercial for Mr. Bubble bath bubbles for kids. In the commercial, if the little boy churned the water enough, Mr. Bubble would appear. My mother was not at all pleased to find sudsy bath water all over the bathroom after I talked her into buying me some Mr. Bubble.
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 used to belive that if you talked into a bubble while blowing into it it would say what you said before— austin franck
- I thought that "Doube Bubble Toil and Trouble" was "Doube Bubble, Toilet Trouble" Anon
- When I was young my mother told me that if I swallowed bubble gum, it would stick to my liver.— Barbie
- I used to believe that if i splashed water on the wall during a bath, the water would turn into spiders— justin