I thought 'stupid' was a swear word up until I was in 2nd grade.
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
- i used to think the word "suck" was a swear wordAnon
- 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 believe that bizarre was a swear word.Anon
- I used to believe that “shut up” was a swear word.Anon
- i used to believe that if you said a swear word you would turn into the opposite sex the next day— jess