Once I walked into a nightclub and locked eyes with a very attractive woman in her 30s or 40s (I was in my 20s). At the time she was dancing with her boyfriend/ husband. As she looked at me over his shoulder, it was clear she was instantly attracted.
A little later, my male friend was chatting with her (very nonsexual guy), and her boyfriend had gone to the bathroom. I walked over to her, and without even a word exchanged, we started dancing, in a pretty sexual/ physical way.
We both knew the attraction was there from the start, so it was like "okay, time to have some fun with each other, no need for words." A less confident man (like my friend) would not have taken advantage.
Now, as a rule I don't recommend getting physical with a woman while her husband is in the restroom, and I'm not sure if this story helps, but I thought I would show off anyway :)
In general, I would say that older women tend to be more sexual, but also more discreet than younger women. (They don't show as much skin, for example.)