I don't swear because it is offensive to me. I feel it is rude, childish, and ill-mannered to swear. So many people will say "I am grown up, so I can swear if I want, now." I say it is much more 'grown up' not to swear. Obscenity is bad enough, but I especially hate to hear profanity; it is like a physical pain to me. In my opinion, it takes being a real adult not to swear.