I just came across this and had to throw my two cents in. My wife is 70 and I am 76. We have been married for 33 years. We have had a very rewarding sex life for the most part. Not perfect, but satisfying. Since injuring my back a few years back, my libido has slowly diminshed to the point where hardly anything gets me aroused. My wife is okay with that. Our love is deeper than sex. Yes, it is an important aspect of a loving marriage, but, sometimes, it is necessary to look past that part of your marriage. Focus on other aspects of your life together.