I’m short on time, so I will link to this article about non-monogamy in the gay community, which I found because of this podcast episode at double x about monogamish (I hate that term) gay couple and how it relates to changing how we (they mean straight people) see marriage.
While listening to this podcast, I wanted to throw things. They asked questions like can we (straight married people) learn something from these monogamish gay couples? And made the point that gay people do non-monogamy but straight couples just cheat.
I don’t have time to dissecct the discussion, because I have work soon, but I urge you to listen to this for yourself if you are interested. There is so much wrong with this conversation.
How the hell do these people have this conversation with no awareness of the existence of polyamory? I looked in the comments, and no mention of it there either. I mean, I do go on about how the mainstream is very unaware of polyamory (they should at least know it exists), but to see it so blatantly and ignorantly gabbed about (they call the podcast a “gabfest,” so I am not being flippant) in this way is really frustrating.
I will try later tonight or tomorrow, probably, to contact the people who run this podcast to see if maybe some dialog and perhaps some education could be in order. For now, I will leave this as is.
Skepticism, Properly Applied 
I tend to find that anything sex or relationship related on the slate podcasts WILL piss me off. They have absolutely no shame about talking purely from their own well-off/straight/white/monogamous/vanilla/married/30+ perspective, and on the rare occasion that they do talk to someone that doesn’t fit in that group, they are fascinated to the point of being other-ing and condescending, as if the outsider was some kind of zoo animal for making choices outside their own experiences.
I appreciate Slate for having relatively competent and interesting coverage about lots of things, but they have some BIG blind spots, and sex (or at least, any sex that isn’t 100% conventional) is one of them. I mean, go back and look at when double X and the culture gabfest were talking about 50 Shades of Grey. It was almost 100% awful.
They did follow up by having a discussion with someone who identifies as polyamorous (actually a friend of friends of mine who my spouse (a frequent Slate commenter who knows a lot of the staff) recommended to them. Not sure if this will answer ALL of your complaints, but I think it is a good start.
http://www.slate.com/articles/podcasts/doublex/2013/07/the_trials_of_huma_abedin_polyamory_and_texting_exes.html