Before meeting my current and life long partner, I had another relationship where living together was discussed and put up as am objective but it would involve a third person, as my then partner was bisexual and she had a somewhat stable relationship with a girl.

It was an unusual discussion at the time but it was an enticing idea for me then.

We even got to sit down and talk about it and one thing that got settled rather quickly was that we were open to the idea of being, eventually, sexually available to each other.

Things never happened because the pivotal figure in the triangle dumped us both for another person.