Gay columnist Dan Savage gets a marriage license for himself and a lesbian coworker and in the process he exposes the idiocy of laws against gay marriage:
Like I said, Amy and Sonia and I didn't show up at the county building last Friday because we were planning to sue. We came to make a point about the absurdity of our marriage laws. Amy can't marry Sonia, I can't marry Terry–why? Because the sanctity of marriage must be protected from the queers! But Amy and I can get a marriage license-and into a sham marriage, if we care to, a joke marriage, one that I promise you won't produce children. And we can do this with the state's blessing–why? Because one of us is a man and one of us is a woman. Who cares that one of us is a gay man and one of us is a lesbian? So marriage is to be protected from the homos–unless the homos marry each other.
With the exception of health related concerns, and protecting underage children from being victimized by adults trying to marry them off for whatever reason, I'm stumped as to why the state has a compelling reason to try and control who marries whom.