Top moral arguments in favor of gay marriage

Now, I am not saying that the Torah permits sodomy. I know it doesn't. But there is nothing in the book to prevent consenting adults from forming partnerships that permit them to share bank accounts or visit each other in the hospital. Also, allowing gay marriage has no effect at all on how much sodomy goes on in the world. So though I can agree there might be Jewish reasons to object to sodomy, I see no Jewish reason to object to gay marriage; furthermore, it seems clear to me that my ethical obligations are as follows:

Ma da'alach sanei, lechavrach lo sa'aveid: I'd hate it if a bunch of yokels from armpit America got together and said Jews can't get married. So, as per Ronald Reagan, I mean Hillel, I refuse to do it to someone else.

Kofin al midat S’dom We must help others out when it comes at no cost. Letting the gays marry each other doesn't cost me anything, so why should I try to stop it? Or put another way, why would anyone without an abiding hatred of homosexuality be against this?  Because the bible says "Thou shalt not have gay sex?" Great, but  as anyone with sense understands letting gay people sign marriage documents does not cause them to have gay sex. They're already having gay sex, I presume, and will continue to have gay sex whether they can get married or not. 

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