I'm going to have to disagree. Getting married to your dog. At least not with today's technology. Let's say you die and your dog gets half. How do we know what your dog wants to do with it or who the dog wants to leave the money to when it (he/she) dies? I don't speak dog. At least with another queer, you'll probably have some idea.
And yes, it doesn't have to be a dog or vibrator, there are cases where people are incapable of stating their intentions as well, but whatever.
Oh and the ideas are completely different anyway (regardless of what you do or do not want me to say). Tell me how same-sex marriage is bad. and moral reasons are opinion. Try to give me some facts. I want to hear them.
Oh, and good point daenku. Only thing separating these people is gender, kinda like race (an amendment that couldn't pass even in 1912).