I have found that most people don't ask. that has been my experience. you will come accross the occational tackless person who will say something. it is not any of their business, so whatever you want to say is fine. i look at it like this...would you walk up to a guy who has pock marks all over his face because he once has bad acne and say "hey, what happened to your face?". people who ask have already developed a idea of what or why or how. i say screw them.