I used to think that the word "wanker" wasn't swearing, and once I went to watch the football (soccer), and when the referee made the wrong decision, me and the rest of the fans got up on the chair and shouted "The Referee's a wanker!" My grandma looked shocked because she thought I was a polite little lad.
A childhood belief about swearing

others believed things like this
- I thought that soccer moms were moms that played soccer!Anon
- In first grade, I thought that if I've never heard of a word before, then it wasn't a word.— Destiny
- I used to think that fart was a bad word and then i heard my mom say it once and I was so shocked.— Tara
- when i was a little girl i thought God looked like my grandma and dressed like the statue of liberty. Anon
- i, too, thought my grandma made up the bushel and a peck song. :)— nessa
- I used to think you could go to jail just by saying a word wrong during a speech.Anon