Ching - I, for one, am not saying a word against tipping. However, I think the issue being addressed here is this supposed <i>obligation</i> to tip. You're <i>supposed</i> to tip the pizza guy, you're <i>supposed</i> to tip the cabbie. I <i>always</i>, but I would resent the suggestion that I'm supposed to. I tip because it's a nice thing to do, not because I have to.