Shortly after the MA courts declared gay marriage legal in that state, another group began lobbying to have bestiality laws lessened or dropped.
There are those who say this is necessary in a progressive society. But all of this has happened before and one need only look back on those ancient civilizations to see how rapidly they collapsed.
Perversions are always going to happen. We just can't lend it the mantle of acceptance by condoning it and giving it equal footing with traditional marriage.