When I was a child, I overheard my second eldest brother and his friends saying that when they were children, they knew all of the swear words except the long one beginning with "m." For some reason, I thought the elusive "m" word must have been "Makker." I never dared use this word and was shocked when I heard that it can short for "Malcolm." I then decided I must be wrong and was puzzled until discovering the word was in fact "mother******."
A childhood belief about swearing

others believed things like this
- 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 the word "suck" was a swear wordAnon
- 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
- i used to think that the word "stupid" was a curse word, ranging in scale right beside the "f" word.Anon
- I used to believe that bizarre was a swear word.Anon
- I used to believe that “shut up” was a swear word.Anon