I love when I am stared at I feel beautiful and sexy. And I love to stare, only recently have I begun staring intently at other girls. I want them to know through my eyes and smile that I like what I see, even if not a single word passes between us. Now staring at guys is easy, just watch their crotch become larger or they have to readjust to hide that bulge... Got em!!!!
It would depend upon the time and the place - and my mood.
If I am in the right mood I wood probably return his stare which I have done which has usually embarrassed him.
If it was another woman - anything might happen.