Refraining from curse words has been part of my character ever since, and just about everybody who knows me knows that I don't swear. And you know what? I have never missed those words. I have some of the most foul-mouthed friends you can imagine, and the words don't shock or scandalize me. They're just not a part of my vocabulary.
I have never, so far as I know, suffered a single negative consequence because I don't curse. But the benefits have gone far beyond never getting detention at school or grounded by my parents because of the use of salty language. For instance, it's led me to stretch myself creatively when I really need to express exasperation or any other strong emotion. And it's led me to notice that some swear words, far from being innocuous, can be really debasing, and to have empathy for those on the receiving end.