They shouldn't have anything to do with marriage.
Make it so that the only people filing for the government paperwork are perverts.
Because OUR government was founded on Christian principles. It's based not only on those principles, but on historical and natural law principles as well.
Again, homos can't re-produce. That is the crux of the argument regarding marriage. Without marriage and children, our population would age rapidly with no replacements.
Also, even if government didn't define marriage, homos would still sue to be allowed to marry in churches and by people of faith. It's never enough with this people. Nobody is stopping them from being with the person(s) they "love."