We are older than most of the posters & responders on this website and the frequency of sex has diminished for me as the years advanced. My wife still "needs" to cum about twice a week, which used to be my regular routine for about 20 yeas. I am very appreciative of modern medicine that developed Viagra, etc, as that pill has done wonders for me in the bedroom.
But the pill is only half the equation, as I need the mental stimulation from her and that usually the result of her telling me about her experiences with her former lovers that she enjoyed during our long marriage. Often she recounts how she reach higher feelings of euphoria while with at least 3 of them, than she ever did with me. She had some erotic experiences with her men that she would never consider doing with me.
The agreement that we made early in our marriage was she could enjoy the attention of men she felt attracted to, as long as she was careful about our social reputation and completely open in providing me with the graphic details, has served our relationship well. Even after hearing these details a number of times, they still help me reach my tipping point.
Ironically sometimes while stimulating her I have to quietly recount some of the intimate details she enjoyed when with her men, in order to push her to reach an organism.