V da Mighty Taco said:
Sorry, but I have to ask - how in the world did that 5-way actually happen? Did somebody just stand up and say "Let's have a 5-way, guys" or did it just spontaneously happen? Also, was everyone there bi or did you have non-bi's joining in? If the latter, how did they handle having sex with people who weren't their preferred gender? Just so many questions...
Fair question. First, some background.
My spouse and I are pretty open about our sexuality. When we meet other people who are equally open, and whom we find attractive, we tend to drop into conversation that we sometimes enjoy three-ways or four-ways with friends or couples. Ideally, if the person or people we're chatting with are interested, they will let us know.
See, it's a very nice no pressure method. We let others know we like to have group sex, and then let them decide if they want to take it any farther than a conversation topic.
So, there was this friend who we had a conversation like this with. And she indicated that she might be interested in a three-way with us at some point. So far so good.
A while later, she called us up at nearly midnight. She was in a hotel room, mostly naked, with another couple she was friends with. They were about to have a three-way, but she'd remembered that she'd said she wanted to have a three-way with us, so she had asked the other couple if they were okay with a five-way. They were, so she called us up.
So we drank some coffee, grabbed some protection, and headed to the hotel.
Fun fact - years later, we're still friends with the other couple, but the friend who brought us together moved away and we hardly ever hear from her.
There are some details I've skipped over for various reasons (mostly they factor into other topics discussed elsewhere) but that's the story of how it happened. I will say, I'm not a fan of the spontaneous group sex - I find group sex goes better when it's planned better than that.
Oh and to your other question, everyone was bisexual except for the guy in the other couple. However, that typically isn't an issue, even if you have more straight people involved. One of the first and most important rules of swinging is never, ever ask anyone to do anything they aren't comfortable with. With that many people, you shouldn't have any trouble finding something fun to do that you're comfortable with without making anyone else uncomfortable.