What a choice for my first prompt...
My mother's most damning indictment when I was growing up was the word "silly." When she really, really needed to express her frustration, she might occasionally let out a "shoot."
I admire that.
As much as I dislike swearing on the philosophical level, however, it's an offense I commit far too often myself. Considering how little there was in my house growing up, and how poorly socialized I kept myself, I don't know where it came from.
Probably the internet.
That's only a little facetious. Actually it started in middle school, where I learned the basics. Foul-mouthed little b*stards. (See, I can't help myself.) Now, as I spent as little time as possible with my classmates, I never picked up very many...I never heard some of the bad ones until college.
Most swear words I don't like because of their awful connotations, what they say about people, whether used as direct insults or not. And I don't like hearing them. But the worst part of "those words" is what it does to my vocabulary. Sometimes in my strongest emotional states, profanity is all that comes to mind. It gets to the point where I can't think of any other way to express myself.
Of course, in some ways, it's as curiously as satisfying as any literary turn of phrase.