I wasn't going to respond to this as I'm not too sure its a serious request, but I just can't help myself after reading some of these replies. I dunno whether its just plain funny or just plain sad that some of those who were waving their flags for tolerance and inclusion in the same gender thread can't show that tolerance they demanded here. Instead they rail against this idea and call it disrespectful or going too far. Tolerance for the gender preferences and love-lifestyles of other consenting adults shouldn't be a one way street. If you are going to demand it for yourself, should you not be willing to show it to others?
But, back on topic: From a purely mechanical point of view I support the idea of polygamous life bonds in game. Reason being, I have 4 characters that I play regularly while my RL spouse only plays one. :P