I know others listen to a lot more music than I do - the only poly I know Must Be Tuesday's song: My Boyfriend's Girlfriend Isn't Me - and that is not a love song. (Apparently I don't listen to love songs).
You might want to check out these threads:
http://www.polyamory.com/forum/showt...ighlight=songs
http://www.polyamory.com/forum/showthread.php?t=733
and there was another one around here somewhere where someone was looking for poly appropriate wedding music...
JaneQ