I think being poly is akin to a sexual orientation. As is being 100% monogamous.

There's a sliding scale similar to the Kinsey Scale here (the Kinsey scale is mildly gender essentialist and outdated).

Poly should be legal, but anyone who is interested in it should be educated as to the different types, and understand basic things like, for example:

If you are in a couple, you have to manage one relationship.

If you are in a throuple, you have to manage four. FOUR. Your relationship with spouse 1, your relationship with spouse 2, the relationship between spouse 1 and spouse 2 AND the overall balance of the entire triad.

A lot of the problems listed in this article come from, I think, people not understanding that or what they are getting into when they attempt these types of relationships. You're not just "adding another person."

You're adding a web of relationships that's much more complex.

If you can handle it, it's amazing. I know some very happy polyamorous people.

But if you can't...and it's something you need to check compatibility on early in a relationship. Some polyamorous people can be happy in a single pair bond with somebody who isn't polyamorous, some can't. It's important to be up front about your needs...just like everything else in relationships.