Personally, I’m not going to stop two homosexuals from getting married in the morally decadent church of their choice. However, I’m not sure that I would want to confer legal benefits on such a relationship.
Polygamy is definitely out; I would want that to continue to be downright illegal, since it would otherwise basically be state-sanctioned adultery and promiscuity.
Marrying your dog is a red herring, since animals do not enjoy Constitutional protections.
So we all agree to draw the line somewhere.
We just disagree on where.
But the line keeps moving.