Is this phrase too snarky, or is it an acceptable response to boorish comments along the lines of "You look tired," or "You look sick," etc? I'm assuming of course that it's said in a tone of bewilderment or mild disgust rather than outright sarcasm.
I actually used this one on a person who commented that I looked like hadn't gotten enough sleep, and now I'm wondering if it was the right thing to say. I just wish there were something I could say to people who make these kinds of comments that would clue them in that it is horribly rude to voice unflattering observations like this. Does anyone have any good responses to these types of comments?