It took me a long time to figure out that "gorilla cheese sandwiches" were indeed grilled, not prepared by with or for a gorilla.
A childhood belief about general

others believed things like this
- For the longest time I used to believe that "Dracula" was a gigantic gorilla with fangs, not unlike King Kong.— Mark Cidade
- I used to think that if a gorilla pounded its chest it liked you.Anon
- I used to believe that grilled cheese was called 'girl cheese,' and only girls could eat it.— Paige
- I thought a Monkey was just a baby Gorilla and when they grew up their Tails fell off!— Brainhead
- I was convinced that Gorilla soldiers in Vietnam in the 70's were real Gorillas attacking other Soldiers.— Mario
- that Guerilla Warfare was called "Gorilla Warfare" and it's about fighting gorillasAnon