It amazes me that the gay marriage thing is even a thing. Marriage is a legal contract. You can easily have an attorney draw up the papers giving both (or more) partners the rights of being married. I knew a poly 3some that did that, then had a nice little commitment ceremony. No fuss, no muss, no Westboro Baptist Church picket.

Call yourselves married. My SO and I do. It's convenient and no one cares.