Yes, I do understand it. I have friends who are and I accept it and appreciate that's their relationship style.

Definitely not. There's really only one person allowed in my heart in a romantic sense, and only one. I don't think I could let myself really be intimate (emotionally/physically/sexually/psychologically) with more than one person in that manner. Plus, I already have enough trouble with myself; I think more than one person in my heart would make things just too complicated for me to handle.

I would, but insofar that they're amenable to being monogamous with me. I know a few people who are polyamorous at core, but are in a committed monogamous relationship. That works for them, and that's their choice! Otherwise, if this hypothetical polyamorous person does not want to do such, then I totally respect that.