Good point. I meant non-promiscuity. Maybe "fidelity"? I don't care how many wives Mitt Romney has, as long as he's faithful to them.
Well, it's good that you don't care about polygamy because make no mistake, it's coming, and there's not a damm thing anyone can do about. The simple reason is this, Polygamy is logically inferred from same sex marriage.
Consider:
Traditional mariage is the union of a man and a woaman. It is therefore based on dissimilarity, gender. Since there are only two genders, male and female, then the qualitative infers the quantitative. If you alter the qualitative, you also alter the quantitative. Gay marriage is based on similarity, and therefore, the qulitative yields a quantity that is variable since there is no inherent limiting factor.
To say that gay marriage should be limited to two people is completely and undeniably arbitrary without any rational reason whatsoever.