Originally Posted by curiouslez
I personally don't think it's possible for a couple where 1 is mono and the other is poly to be together; it just seems very unhealthy to me. It's like a gay person and straight person being together; it is possible for those two types to fall in love with eachother and truly care about one another, but that one SMALL detail (gay vs. straight / poly vs. mono) can make a HUGE difference.
It's worked for me so far... not for those who don't like to work on their relationship though.
Do a tag search and research "mono/poly" a bit, maybe you will get some insight as to how and why it might work.