When I was in the 4th grade, I used to think a rubber ( condom ) was something a guy puts on as part of his football equipment. Helmet, mouthguard, kneepads, rubber, etc etc...Hahaha!
Didn't find out the truth until a year later, and was REALLY embarassed!!
A childhood belief about condoms

others believed things like this
- My dad told me that the reason Birds didn't get electrocuted on overhead wire was they had rubber feet!!— Derricki
- I had an 18 lb. cat who ate rubber bands, I used to believe she could bounce away if not careful.— Dawn
- i used to think that condoms were rubber circles and i never knew how they stayed on— hello
- I used to believe that your brain was a red rubber ball inside your head.— Greg
- I used to believe that if I swallow chewing gum, a rubber tree will grow on my head!— Farry Aprianto
- I used to believe tampons go in but they never came out and I aslo belived that condoms were rubber underwear— Elise