Here's a fairly long article about a subject that I've discussed before on my blog.
Let's talk about sex in space
A small quote:
"Astronauts tend to sweat more in space, and decreased blood pressure could make it more difficult for males to hold up their end of the mission. As for the female side of things, the jury is still out on whether microgravity is a bane or a boon to boobs."
I think there's some missing areas, too, because the don't talk at all about the possibility of the launch of a commercial space station, which I wrote about here.
Eventually the time will come.
So will the astronauts, if they do it right.