When the deck in my backyard was being built, the name of the man who built it was Robert. This is also my middle name, so I assumed someone's middle name was always the name of the person who built their deck. It hadn't occurred to me that the rest of my family have different middle names, or that I was given my name (including my middle name) before the deck was built.
A childhood belief about names

others believed things like this
- I used to think the song "Who Built the ark? Noah. Noah." was "Who built the Ark? No one, no one!"— Embarrassed Kent Girl
- I used to think no one built the ark because I confused it with Noah.Anon
- I used to believe that all churches were built by God rather than by people.— Andrea
- I used to think that Hadrian also built the Great Wall of China.— Spacey
- I thought that on the show "American Chopper" they built helicopters.— Alex319
- My sister used to tell me that Victorian houses were shiped from Victoria after they were built.Anon