We don’t look at having threesums, it’s always couples. When we started out, we were had a desire like a lot of couples of having a FFM threesum. The idea was for all of us to be involved. We gave up on that dream many years ago.
we did recently have a short play with just the male of a couple we know. But as I am bi and so was he, it was easy for us all to be involved. But we have agreed neither of us is ever to be left out.