I used to believe that all cocktails contained either shrimp or crab, because of my mother making such cocktails for my dad. The meat was served in a stemmed dish, topped with cocktail sauce and eaten with a little fork. So seeing restaurants advertising "cocktails" this is what came to mind.
A childhood belief about general

others believed things like this
- My mom was always talking about "making
ends meat" but I don't ever remember having it served at dinner!— John Stees - I used to think that Tabasco Sauce contained tobacco, and therefore was actually "tobacco sauce."
Anon - I used to believe that the meat dish 'tripe' was lion.— Kent
- I always thought that duck sauce (from chinese restaurants) was duck poop.
— emily - When you are very poor you "can't make end's meat." End's meat is some sort of cheap very low quality meat.— Betty
- i used to think that mcdonalds served ballons..(the sign said billions and billions served)Anon