I read your article on marriages last week and wish to say this to you: “the Word of God changes not.” Styles, methodologies and traditions may change with time, but what the Word of God said then, it still says today, setting standards for morality, relationships and how to relate with our creator in the right way.
To insinuate, as you did, that the Gospel alone cannot save marriages is, to say the least, obnoxious, abominable before the Lord and all right thinking people. Anal sex is a perversion from the natural order, a product of a debased mind and an abomination before God. Those who do these things need godly counsel, leading to repentance, and deliverance from such bondages.