I could have easily made up some witty retort in hindsight and pretended like I said it here. I don't do that. I usually go off on motherfuckers.
But this was at a work thing, and it was my wife's friends' boyfriends, and I've been down this road so many times. There's just no reasoning with these people. It's a waste of breath and a fight with my wife for being confrontational with her friends. Been there, done that. I just shook my head in disgust and didn't respond with the "Yeah, you're totally right" that they were looking for. That got through to them as much as any verbal argument would have anyway.
That being said, Wench's written response is as succinctly perfect as any I've seen. Well done.