I remember being told as a child that people in China (being on the other side of the world and opposite us, I assume) ate their dessert first. I don't recall if I REALLY actually believed this or not.
A childhood belief about nationalities

others believed things like this
- I'm black, so as a child I used to assume that white people pooped peach the way I pooped brown.— Rick
- When I was younger, I used to think people in China walked upside down.— Max
- I used to believe that in China, instead of Adam and Eve eating an apple? They believed it was a banana.— smartygirl
- When i was little for some reason i thought that all people from china knew karate.....yeah.— sneakydean
- i used to believe that everyone had a twin on the other side of the world.— tahnee
- I used to believe that all dessert was birthday cake.— David