I didn't realize that the word my grandmother used when referring to my "girl parts" was truly a dirty word. I thought it was a word she made up, she never cussed, so it must be okay. When in college and discussing funny names for body parts, I spoke up and said "My grandmother always called it a twat!".
A childhood belief about swearing

others believed things like this
- i used to think that the word "stupid" was a curse word, ranging in scale right beside the "f" word.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 my grandmother had two, shall we say, back ends. I didn't realize the second one was cleavage.Anon
- I used to think the word fever was just another word for giraff— Marshall m
- I used to believe everything starting with f was a bad word after I learned about the "f-word". — Sarah
- i used to think the word "suck" was a swear wordAnon