Oddly enough, when I first started my "internet existence" as a swinger, I started out chatting on the Love More site. They eventually directed me here, which was perfect, since I just didn't get the whole poly thing.
ES is correct - poly is simply "many loves". And as some people like to reserve kissing just for themselves, we prefer to reserve falling in love just for each other.
It was kind of funny, though. I was talking to a guy once from the west coast who told me that he had been to both poly conventions and lifestyle conventions and marveled at how quickly most poly's could fall in love. They meet each other as strangers at breakfast, fall in love by lunch time and then have a nice big late dinner after consumating their newly found loves...
Not all of the poly life is this way. I actually find it fascinating up to a point. But poly people do tend to put love before sex (often defining love in the heat of the moment) - while swingers tend to be okay with having sex with friends and strangers.
Lots of times, though, your more dedicated polys have a rather low opinion of swingers. But, in fairness, they would tend to view swinging the same way monogamous couples would. So, I can understand their ire.
Spoomonkey