For the last two days, Mat Staver and Matt Barber have been discussing the Family Research Council’s “Ten Arguments From Social Science Against Same-Sex Marriage” document on their daily “Faith and Freedom” radio show. On today’s broadcast, the two cited reason number six – “Same-sex ‘marriage’ would undercut the norm of sexual fidelity within marriage” – to argue that legalizing gay marriage would somehow result in straight couples becoming less faithful.

Citing quotes from gay writers like Andrew Sullivan and Dan Savage, Barber and Staver argued that gay male couples are more likely to have open relationships, which they then used to bizarrely assert that letting gays get married would ultimately undermine the practice of monogamy within straight marriages.

“You start doing that in a marriage relationship with a man and a woman,” Staver said, “and the woman’s just not going to do it.”

“We know that women serve to domesticate men,” Barber added. “That’s not an opinion, that’s the social science that shows that women ultimately bring men into their role as father, as provider, and protector for the household and they domesticate men and that lends itself toward monogamy.”

There are plenty of straight couples, of course, who engage in open relationships, so what any of this has to do with gay marriage is anybody’s guess.