I'm a straight guy of 21, and I'm housemates and buddies with a couple who are college friends. This couple have been together four years now, which is also how long I've known them. Anyhow, the interesting stuff. They're both quite enthusiastically sexual. She's got more libido than he does. I've got a big sex drive too. Both of them have stated an openness to poly situations, i.e. letting the other one fool around with/go on dates with other people. She started flirting with me three weeks ago, flirting turned into no-sex threesomes with her and her BF every few nights.I'm perfectly fine with poly—or I wouldn't be doing this—but it feels a bit awkward to me, fingering her or sucking on her nipples while her boyfriend is in the room, or even the same bed. Both of us guys are straight and have no desire to see the other naked, so there's none of that going on. I've got no beef with guys who like beef, but guy-on-guy, or even being in a sexual situation with another guy—like the one going here—makes me uncomfortable. And anyways, I always feel like he's the "primary" one in the relationship; the one that she loves and kisses, the one who loves her back, so I tend to move over whenever he shows interest. This is reinforced because she said that she didn't feel comfortable kissing other guys—although fingering is fine?—and I get the impression (although it could be my imagination) that he's not entirely happy that I'm cuddling and/or fingering his girlfriend while he plays Dawn of War five feet away from their bed.
I'm perfectly fine with being the "secondary" guy; I'm still looking for an actual relationship anyway, and would stop the sexy-time if I found one. But I'd much rather have some privacy if we—meaning me and her—are gonna try to get each other off, particularly if this arrangement of ours should progress to actual sex. This is tough, since I have a roommate and there's nowhere else in the house to go other than their room. Incidentally, we haven't told our other friends/housemates about this, although they could probably put 2-and-2 together; she screams in orgasm and half an hour later I say goodnight and go back down to my room.
Any advice in making the situation more comfortable for all involved?
Can't Think Of A Clever Name
My response after the jump...