I used to think that the characters in the simpsons were yellow because the creator didn't have any skin coloured markers when the first episodes were made. Maybe it's true!
A childhood belief about cartoons

others believed things like this
- When I was 6 or 7, I believed that people could have yellow skin like in the simpsons— Noah
- I used to believe that the people who "colored" The Simpsons ran out of skin-toned crayons.Anon
- I used to think that someone having dark-coloured skin was a result of eating too much chocolate.Anon
- Washable markers could actually be washed off of paperAnon
- When was 5-6 I used to think that leather was made from hippo skin.— Richard Davies
- I used to believe Jessica Simpson was a secret character from "The Simpsons"— Lemon Jelly