Santorum and Gay Marriage

Well, hell Santorum, if gay marriage equiparates to heterosexual marriage as paper napkins do to paper towels, they're both paper. So that means marriage of anybody to anybody is a celebration of an intimate equal union between people on so many levels. How can it be even vaguely compared to bestiality incest and polygamy where the interaction is not only unequal, but oppressive and harmful?

And, while we're at it, how is marriage only about sexual contact?