“Swingers” by Robert Reed - this is a great free short-story over at tor.com. The tag line reads:
The aliens have arrived. And they want to Join. Yes, that means what you think it does.
Sexuality is such a fundamental motivation to almost everything humans do, using it as a plot-element in scifi is almost unavoidable. This story has a new twist on it and, like all really good scifi, a very clear message that’s just as relevant in the future as it is right-here/right-now. Go read it!
