The biggest problem with reaching middle age with all of your faculties and functions in tact is the lack of opportunity to use them as you would like too.
Having spent years accumulating and perfecting ways to please women, you find yourself at the point where women your age are looking for boy-toys and younger women don't want anything to do with older men. They don't realize until way to late that for simple sexual pleasure, without all the games and B.S., an older man is by far the better place to find satisfaction without commitment.
An older man knows how to be gentle with an inexperienced partner, patient with a slow learner, innovative when it's needed,and has the experience to please them all.