Would I want to sit down to dinner with a couple of muff divers who’s sole reason to invite me is to listen to their horse dung and show me how they are destroying the lives of two innocent children??
Hell no.
This is just one of those things there is no way to win. If he refuses he will be called a horse’s ass , if he goes he will still be called a horse’s ass when they cannot convince him that Every man should marry a man and every woman should marry a woman and the two should only meet for breeding purposes.
Why use such a vulgar term? Simply saying that the women are lesbians would have sufficed.