Hmmm...

Then it sounds like "doubling" would be a way to play a 1x1 with my own "couple" while also allowing both of us to "play two couples" in a dual romance interaction. In other words, it's a flexible term, by the sound. Dependent on what the two players want to do. Works for me.

Though I do find the subject still of interest, perhaps this thread a help to others who may have the same question.