When I was about 12, my family moved to the UK, and (along with other phrases) I was confused by the term "gherkin". Not wanting to sound stupid, I assumed it was a, erm, special part of one's anatomy. This was confirmed even more when my American chum called it a pickle. So one nite at a resturant, when the waitress asked if I wanted a gherkin along with my sandwhich, I shreiked and caused a rather large scene. My family still torments me about that to this very day...
A childhood belief about gherkins

others believed things like this
- Up until 5 seconds ago, I had no idea wat a gherkin was— It's a little cucumber, stupid!
- I used to think that a gherkin was some kind of piece of machinery. I wonder where I got THAT from...— Some Idiot
- Until I was about 11, I thought it was called a 'Girl Cheese' sandwhich.— Chris
- My mother convinced all of us kids in our family that the large rhubarb in the garden was a Man-Eating Plant. — H.Miller
- I was about 6 and thought my family invented the fart because I never heard anyone outside my family do it.— Bob
- I used to think that in the song"Family Affair, they were saying "It's a family of bears!"— Wayne Huffman