What would you do...

... when someone smiled at you or even winked an eye at you? What would you do when someone looked at you and kept looking (is that staring?) at you as though you looked "delicious". And what would you do when you overheard someone commented "hey, he looks gay" and looked at your direction? The first 2 incidents happened to me in the gym and didn't exactly know what to do. Got stunned, perhaps. And the last incident happened to me when I was blogging at Starbucks, and also at the gym.

So what would you do then?