This gets back to the, "I don't feel like it" school. These people think they should do what they feel like doing. They don't believe. or don't understand, that emotions can follow actions.

When enough people don't feel like wanting a sexual relationship, psychologists, professional and amateur, are ready to cook up a medical-sounding term and then describe it as normal. Accepting that is a dead end.

Of course some women, and men, are born with lower sex drives. Some lose their libido with aging. Some women experience decreased libido after a childbirth, and assume it means they must not really love their husband any more.

Some men experience loss of libido after an injury, or treatment for prostate cancer. Other men may become less capable, or incapable of having sex after such treatments, but still feel a hire desire for their wives.

The same opposite results may follow a woman after surgery or other treatments for cervical cancer, uterine cancer, ovarian cancer, or a hysterectomy.

Personally, I believe a lot of the final direction things take is entirely mental. Go read the testimony of the survivors of these extreme medical treatments, and you will see the entire gamut I describe, but some will begin in one place and end in another. A lot of men and women will find that the powerful sex drive, or lust, may be gone, but it no longer overpowers the feelings of affection and appreciation they have for their mates. For them, a door closed, but a new door opened to a deeper sexual bond in their marriages.

Those who did not move to that new level of sexuality may have other negative influences in their lives that they did not overcome. But they may have just taken the shallow feelings they had as a sign, or proof, or an excuse, that they did not need to try. That's the mental difference.