I had a 100-year old neighbor that grabbed my butt, then she laughed like a teenager. It was shocking, but only because no one would associate centennials with that kind of behavior; otherwise it's a super funny story to tell at parties.
I never reciprocated or led them on. The most I can say is that I was affable and would indulge anyone who wanted to talk. I will admit that I never really felt threatened though, so I think that still makes the situation different than women experience.