@spendius,
Fair enough.
Assuming married gays are faithful (a huge assumption I admit) then a monogomous relationship between same sex couples does benefit society if only because it limits the spread of AIDS, and may reduce the number of hedonistic sybarites marching in g-strings in Gay Pride parades.
Now, of course, gays don't need to be married to commit to one partner but if it makes it harder for them to stray (as it does with heterosexual couples) then it is a good thing.
We needn't place a heavier moral burden on gay couples then we do on their heterosexual counter-parts.
Gay Think Tanks place the percentage of Americans who are homosexual at around 6% and so this issue is really a fabricated mountain denying the molehill status is actually deserves. Liberals, however, pine for an oppressed victim they can champion from their keyboards, and so Gays have assumed relevance far beyond their numbers.
There are so many more important problems to be faced then whether or not two old queers get married. It's not, in my opinion, worth fighting and particularly so if the basis of the fight is the preservation of the institution of marriage. We long ago, thanks to liberals, debased that institution. Gays getting married can only help to shore it up (Of course such a reaction will only be temporary. Once gays get what they want they will divorce one another at the same rate as straight couples)
Western civilization has much more to fear from liberals than it does homosexuals.