When I had first heard of the infamous Clinton/Lewinsky affair, it was the first time I had ever heard of "oral" sex. I pretty much thought it was someone humping your mouth. Hahahaha.
A childhood belief about oral sex

others believed things like this
- whenever i heard a melody, i thought it stuck in my stomach when i heard it in my mindAnon
- The first time i heard of someone getting fired from a job, i thought that they were actually set on fire.Anon
- When I was young, I heard the word 'minion' for the first time and thought it was a miniature onion.— Karin
- I believed that oral sex was people having sex in space.
I think I got 'oral' mixed up with 'astral'— PinkPanther - That a dog humping someone's leg was just really happy. — Ruben
- As a kid every time I heard a person say "it's about time" I always replied "so what about it?"— Eli the Kid