They would have no standing using the same arguments, because one thing that EVERYBODY can agree on, religious or not, is that rape is wrong, and it is a crime, and it is not the same as gay marriage. The fact that you think you can pair bestiality and gay marriage into the same category shows your ignorance on the issue. If there is a slippery slope (which I don't think there is), it doesn't involve fucking barnyard animals!
Two men or two women having sex or marrying is every bit as ridiculous, sick, and wrong as sex with a barnyard animal.
