Sorry about the derailing. I was also going for levity with the lyrics from Schoolhouse Rocks "Interjections" song.
Now back on topic...
Anyway the bottom line, which I think we agree on, is that coupling or tripling are not the only ways of being poly.
I agree with the thought of this, although it is not my particular desire, especially since I am married. But this set up reminds me very much of things I read in Ethical Slut. They have an entire section devoted to "Single Sluts". Although the book does seem more sexually the emotionally focused, it was still a good read.
And just as there is no one right way of having or being in a relationship, there is not one right way to be poly.