When I was very young (about 3 or 4 years old) I was a big fan of tomatoe sauce / ketchup. Back then, all tomatoe sauces came in glass bottles that you had to bang the bottom of to get the sauce out of.
It seemed logical to me then that these same physics should apply to the human body, so when ever I went to the toilet to do poohs I would sit there banging myself on the head with my hand trying, literally, to knock the s**t out of myself.
A childhood belief about weeing and pooing

others believed things like this
- When I was Little, I thought a Pizza Pie was Tomatoe sauce, cheese, and Pepperoni inside of a pie crust....— LarLar
- I used to think that Tabasco Sauce contained tobacco, and therefore was actually "tobacco sauce."
Anon - My Dad told me that Soy Sauce was made of grasshopper spit! I didn't eat it for YEARS!— TawnyKat
- My father used to call soya sauce "monkey blood". I didn't even consider tasting it for years!— Me
- my grandfather told me that soy sauce was bug juice.Anon
- if you got sprayed by a skunk you had to have a bath in tomarto sauce— rob