Let's make it available to everyone. As a woman in my twenties, I find it hard to have respect for the idea of marriage, because it doesn't seem to have any bearing on whether people stay committed to each other. I see single-sex couples who are barred from getting married staying together for life, and I see people my own age who have already gotten divorced. I don't see a reason to get married, other than to throw an expensive party. The only sound argument would be that marriage gives you certain legal advantages, and I think I would feel guilty taking advantage of something like that if my friends aren't allowed to just because they're gay.