I don't have as many miles as the OP, but I've been surprised by this phenomenon as well. Then again, I take really good care of myself and work out, but whenever I'm back at my alma mater to do some work, or I go to visit the young man that I mentor, I attract a lot of attention. It's a boost to the ego, definitely. And I think it depends on where you are--I live in NYC, and here I've found the women to be MUCH more forward in terms of signaling their interest in you than in other places.