Regarding the common argument that if we allow marriage between gays why not between people and animals, one should keep in mind that in the eyes of the law marriage is a legal contract. Since animals can't enter into legal contracts, this is a non-issue.
Hmm, we can kill the animals and eat 'em, but we need a legal contract with 'em to marry 'em?? Hmm, let me think about that a little bit.
But what of incestuous marriages? Legal ages, of course. Oops, but wait, forcing people to wait 'til legal age is, in itself, age discrimination!
How 'bout knotholes in fence posts? I like to fuck them sometimes, so would you march in protests to allow me to marry those fence posts? Please?
Baron Max