For me, the idea of same-sex marriage should be more about encouraging committed monogomous relationships than it is about support for literal biblical moral arguments against homosexuality.  The level of hypocrisy surrounding what is or isn't moral about uncommited multiple sexual relationships between consenting adults depending on whether they are gay or straight seems obvious to me.  However, it gets lost in translation when the literal biblical position against homosexuality per se is allowed to trump the higher moral standard of committed monogomy.  I wish that the conversation could be broader and less of a litmus test which is so often espoused by the far right.