Secularly, I see marriage as a state sanctioning, approving, and incentivizing the nuclear family unit. The unit that has been shown to produce future generations and provides for social stability, so the state has an interest in it. Homosexual relationships can't do that, so I don't in general oppose such bans. It hasn't to do with dignity, but whether the state has an interest in the relationship. Now, while I was thinking about this, if a homosexual couple had adopted, especially given the nature of our foster and orphanage situation, I would approve of a state marriage, for the nuclear family is being imitated.