My case against same-sex marriage was always entirely secular. I believe we need a social institution that is about directing the passions of men and women attracted to the opposite sex -- 98 percent of people -- so that our sexual acts do not hurt the children our bodies create in passion. To me, that's the heart of "civil marriage" and the explanation for why the government is involved.
I don't see that changing. I hope I am wrong that gay marriage will change that as the public idea of marriage, but the evidence is pretty strong that I am right: It is very hard to see two men as a marriage, and still see marriage as integrally involved in procreation and family structure.
Would love for you to prove me wrong. I would love nothing more than to be wrong about this.