My suggestion for him is that the first thing that I needed to do in my SSM, was stop trying to change my wife and work on "fixing me." Making me a better person, who better understood the dynamics of relationships, who was more in control of myself, and who could decide on and make changes in my life that were visible to others.
I don't know what more I can say. Like I've said, I haven't tried to fix her at all in the last several years (for which several others here have critized me for NOT doing). I have made changes in my life.
Are you assuming I haven't done these things merely because my wife is not having sex with me?
And yes, I have apologized to my wife too. And she appreciates that. And I don't pressure her for sex.
And so far the result is that she's perfectly happy with no sex.