One of my properties has a lot of senior citizens and you just would not believe what goes on. On more than one occasion, I have seen older people, male and female, "sneaking" out of one another's apartment. In fact, in 2003, some of the apartments flooded and a couple of females didn't give it a second thought to go and bunk with their male friends until their apartments were OK to live in again.
Oh, and how they LOVE to talk about sex. They all say..."Well, we aren't dead yet!"