"The Gathering" by Patrick Donovan (drwho@world.std.com). The man's lover has come from a distant city to visit him in Indianapolis. After he and Kathryn have made passionate love several times, another couple arrives unexpectedly for a visit. Kevin is a professional masseur, and his girlfriend is one of his best students. After the spend the evening out, they return to the apartment, where Kevin and Nancy offer to give Kathryn a massage. The narrator joins in, and the massage becomes much more than simple physical therapy - it becomes VERY physical therapy indeed.

I'm not going to try to describe in detail the ensuing orgy - except to say that it's some of the hottest sex I've ever read. A potential turn-off to some readers (but not to me) is the fact that there's male/male sex as well as variations more common to group sex stories. I suggest that you just be open-minded and enjoy it, even if that's not your style; otherwise you'll miss a great story.