It's a bit of a foreign dynamic for most of us. I'm trying to think of what would be of immediate use to offer up and expect something to bubble up eventually--just nothing at the tips of my fingers.
When speaking of various forms of non-monogamy...it ain't poly if you're just fucking around.
While polyamory, open relationships, and swinging are all distinctly different approaches to non-monogamy, they are not mutually exlusive. Folks can, and some do, engage in more than one of them at a time--and it's all good.