OK, being an all around sarcastic, cynical smart alec at all times. I made comments like that at first to be funny, now as the number of jokes grow, it has only become natural.
My hope is that you do not start at a very young age. Same yourself some punishment and from making cold hearted, awkward, and all around dislikable comments on serious subjects such as murder, AIDS, etc.
Don't like it? go to your yuppie friend over there so he can blather on about how he is the real Paul McCartney and blows smoke all over the room, and so that you can talk to someone who seems to even care about what your pathetic life has thrown as you even though even if that didn't fly over his head already, he will not even remember this in an hour or so.
See what I mean?