I lived near a high school when I was growing up, and one day I asked one of the football players coming home after a game what he had in his duffle bag. He told me that football was a violent sport, and he had body parts of the players that got beaten up in the game - I believed him for years, and concluded that he was taking them home to bury them in his backyard!!
A childhood belief about general

others believed things like this
- When I was little, I used to believe that football players really had shoulders that big.— Angie
- My dad told me that playing basketball makes you taller. Basketball players are tall, so I believed him.Anon
- I used to believe that the game The Legend of Zelda: Twilight Princess was the longest game ever.Anon
- I used to think that a conductor while conducting told the players what to play as opposed to their music.— Daryl
- I used to believe that records were the power source for record players.— bob
- I thought for some reason that chewing tobacco was REQUIRED for Major League Baseball players.— Jeff