I assumed Molotov cocktails were a kind of drink and thought it was strange that people always wanted to throw them at buildings. Until I was 17 or so.
A childhood belief about drinks

others believed things like this
- I once thought people would keep growing until they were as big as buildings if they didn't go to the doctor. — Tufty
- I used to believe that if I got my hair cut like Farrah Fawcett's people would throw ashes on me.— mel
- I thought the "To Let" signs on buildings meant they were public toilets.— Scottish Laddie
- I always thought thunder was the sound of the crumbling buildings, after lightning had struck them.Anon
- I thought that "heck" was a less horrible version of hell for people who were only KIND OF evil.— Oizys
- When I was young my mother told me that old people kind of shrink. I thought that they shrunk into babies.— dont know