Interesting bit of advice but think about it. When, where and why did a contract causing two people to remain together regardless of the situation, originate? I completely understand staying under any and all circumstances if you feel you are compelled by a religion which for many is the pinnacle of their rules for living. I can also see that if one of the party had some sort of medical or mental situation which precludes them from joining in sex. But as I have stated in the past here on HF it is my view that two people live and experience each other joyfully. Once we name it “relationship” there are automatic rules, boundaries, restrictions, guard rails, must do’s and must not do’s. I have experienced both men and women in my life, some for a few days other for a few years. Willy Nelson and Julio Ingelias sing about it, “To All The Girls I’ve Loved Before.” From a strictly human being perspective without the religion caveat involved, when one of the two people change after some time maybe it is clue to re evaluate the situation. Humans were not born to be unhappy and discontented year after year. If this is allowed they both fail to live a full and blissful life. We join together and learn and teach each other. Sometimes that ends and its time to move on. There is always more to learn and others to teach. IMO discuss, discuss and discuss again and get to the nucleus of the problem and make a decision. Who would be hurt by moving on if one person says "I have changed and now I just don't enjoy sex any more?". That person should man up and say, "I don't blame you for wanting to move on, I would do the same in your shoes." Some people are attached at the heart and maybe it will hurt for a time but in the long run it will be worth it. Been there and done that and I feel I have made the correct decision many years ago.