If adding player "marriages" to be same-sex is going to cause a tidal wave of sand to fill one's nether regions, just turn the system from "player marriages" into "player unions"; we don't really need to hang this system up due to the semantics argument people feel the need to make IRL. I know plenty of people who chose characters of the opposite sex when they play games/MMOs, and if they want to add the system at all, open it up for all.
I don't understand why people feel the need to dig the topic twenty layers deep with BS (polygamy, pets, pedos; where is there equal rights!?!?) just to be obnoxious and exclusionary. Player unions have been around forever, they don't need to reinvent the wheel here.
It is a terrible counter point. People who think LGBT marriage is comparable to pedophilia and bestiality are obscenely stupid. That being said, it's not like anyone is going to change any minds on the internet, let alone a FF forum, so it's irrelevant to go much further into this conversation anyway. They should probably just respond to this thread and/or immediately lock it to save themselves the trouble down the road.