I know I am only one of many who, as a small child, thought that the worst thing anyone could possibly say was "shut up." When I worked briefly with 4- and 5-year-old kids in 1979, I was amazed to find that there were still kids who thought the same thing!
A childhood belief about swearing

others believed things like this
- When i was little, i thought that when i grew up i could only have two kids because i only had two testicles.— nick
- when i was like 6 i thought only little kids my age could have long hair. dumb....lol— candy
- I thought that kids' pee was yellow and adults' pee was clear.— Aretia
- I thought Jesus was made up to make kids behave.Anon
- Up until I was about seven, I thought soda pop was alcoholic and that's why kids weren't allowed it.Anon
- My mom thought "euthenasia" meant Asian kids.(youth in Asia)— Ibelievedher!