Scraped from statements I have made in the past, my own Paulian take is to reject same-sex marriage, as follows:
I believe government should stay out of marriage, period. I oppose all government marriage licenses, and believe they should be replaced by traditional private contracts or common law arrangements. Let the church determine what marriage is, as they did for ages until a few decades ago. Marriage is a religious RITE, not a civil right, and while the state has improperly imposed itself with regard to heterosexual marriage, state power or intervention should not be further expanded to other alleged classes.
Neither should state power be used, as in the case of the federal Defense of Marriage Act, to impose a definition of marriage across the nation. The DOMA law should be repealed, as the state should just stay out of this matter. Benefit, insurance and other support issues involved with alternate relationships should be resolved through private contract. Gays should be free to identify such a contractual bond as 'marriage' but people should also not be forced by the state to recognize it as such. Gays can do whatever they want and can call it whatever they want, just so they don't expect to impose their relationship on someone else. They can't make me personally accept what they do, and gay couples can do whatever they want.
I regard much rhetoric about 'rights' in politics to be illegitimate, and often simply a pretext for demanding group privileges or subsidies that increase overall state aggression, in a manner that comes at the expense of the real liberty rights of others. I support individual personal liberty in sexual matters, but oppose efforts to further expand group rights by using government to codify legitimacy or approval for behavior that remains highly disputed. Initiating force through laws that de-facto coerces people to accept behavior they see as immoral, is not the way to solve this or other social issues.