I dreamt I was in a trinogamous relationship (where there are three people all dating each other) with FI and another woman. It was interesting, I don't really know if I could be in a relationship like that, though. Especially for the long-term, love-y type thing, as I picture myself with one person instead of two, and it would probably be a lot of fun explaining the relationship to people. I imagine one might get jealous, too, so it would probably be a lot of work making sure everyone felt loved and equal.
Have you been or could you be in a trinogamous relationship?