When I was little, I thought that the "sex" section on a driver's license told people how good you were at sex. I always tried to figure out what "M" and "F" stood for, exactly. Which one was bad, and which one was good?
A childhood belief about sex

others believed things like this
- I used to believe that without a license, people were somehow phyiscally incapable of driving.Anon
- when I was a little boy I thought i would become zidane but i was not as good as him— elbouteman10
- I thought you had to get a license in order to be a parent (which acutally might not be a bad idea!)— Elviessa
- I thought that a person's motorskills meant how good they were at driving!Anon
- I thought when someone was described as being "mild-mannered" it meant they didn't have very good manners— Samilton Duerheiser
- When I used to see a sign saying "Littering Fine" I thought they meant if you littered REAL GOOD!— Lou V.