Like all things in this lifestyle it's sometimes a case of suck it and see (maybe that wasn't the best expression to use here!). Over the years in several MMF situations, it's seemed right to have involvement with both of the other players, and enjoyable. I've also experienced a couple of times with other males, just because it seemed to be the right thing to do at the time. I wouldn't label myself bi but there again you don't highlight that you enjoy other aspects of this swinging scene either.