I don't eat any more when I'm upset nor when I'm feeling energized. My appetite varies by ridiculous amounts seemingly at random.
Of course, everything my body has done over the past several years has been really erratic. I had a treatment several years ago that messed me up from top to bottom and the aftereffects of that haven't finished shaking out as yet.
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.