This happens to me ALL THE TIME. For some reason, the older ladies at work just LOVE me to DEATH! Fortunately, almost all of them keep their comments civil (it's kind of nice of them and I'm flattered).
However, a while back I was propositioned by one of them. I had to maintain my cool, be polite, and say 'no' as diplomatically as possible. The weird thing is that to this day I wonder if I made a mistake because who knows how much that would've meant to her or, better yet, how good those teethless gums would've felt.