I moved to the USA when I was a kid and had to learn english on my own. I didn't understand much about what was going on around me. Lunch time was hell because I was on my own. I knew what a jelly fish was, but I didn't know that 'jelly' by itself meant something. I thought for months that peanut butter and jelly sandwiches served at the school cafeteria were actually peanut butter and jelly fish sandwiches. Needless to say I brought my own lunch on these days.
A childhood belief about dangerous food

others believed things like this
- I thought that barf was what they used to make peanut butter and jelly sandwiches!— Maan o' War
- I used to believe that my mother invented peanut butter and jelly sandwiches. Anon
- I thought jelly fish were made out of fruit jelly. — Kevin
- I used to believe that if you didn't take your socks off at night your feet would turn into jellyAnon
- I used to believe that jelly came from jellyfishAnon
- I used to think jelly came from jellyfish's tenticles— Rachey b