I thought gherkins were pickled slugs.
A childhood belief about gherkins

others believed things like this
- Until just a few seconds ago, I thought gherkins were beans or something weird like natto...Anon
- I used to think that slugs were just snails who had lost their homes!Anon
- When I was little, I believed that slugs fell from the sky because they always came out when it rained.— JoJo
- I used to believe that slugs were deadly and they would bite you and kill you. 0_o Where did I get that idea?— What was I thinking?
- We had an antique lamp that I thought was hideous and for years I thought "Art Deco" was a synonym for ugly.Anon
- When I was younger I thought MTV was an x-rated station because I thought M stood for Mature.— Aeris