Once I went fishing with some guy and his daughter, I think he was a friend of my parents or something... Anyway, a fish stole my bait without getting hooked and the guy said "Oh, you got mugged".
Later after that I heard about people getting mugged and I thought that fish took their bait while fishing.
A childhood belief about hobbies

others believed things like this
- I used to believe that the term "being mugged" meant someone beat someone else with a coffee mug.— Matt Thiel
- I used to believe that a fish cake was a fish in sponge and coated in icing. I believed this until I was 9.Anon
- i used to beleive the ice cream man was a fish man - becuase i hated fish.— jordan
- Burned fish fingers ment the fish was from the black sea.Anon
- i used to believe the white part in fish meat is because of the fish's milk— Kim
- i used to believe that scampi was fish toes instead of fish fingers....Anon