I think a HUGE part of men not having sex as much anymore is the dominance of cell phones, internet, and computers.
It has changed the dynamics for both men and women:
- For men, it's given the average man a very easy "out" to sexual frustration through the form of pornography. Rather than work to seduce women, he can fire up a video, a game, or a VR scene of his favorite sexual fantasy and just skip right to pleasure with minimal effort or expenditure. Why spend time going out and talking to women and risk getting shot down if you can just spend a few minutes on your computer, or VR device, or cellphone and get your rocks off easily that way? Additionally, the majority of men who are not high-value to women will find the distractions of video gaming and pornography far more appealing than facing the harsh reality of their value and status not being able to bring in the women they crave. This is not helped by media, both online and traditional, pedestalizing the most beautiful women, desensitizing the average man to the average woman, who in times past, before the Internet and Television, would be more than happy to accept an average woman as a partner, but is now influenced by media into thinking that he needs, and deserves, the most high-value, beautiful, youthful woman.
- For women, it's basically inflated their value and self-worth to stratospheric levels due to constant barrage of validation they receive from posting pictures on Instagram and Facebook and other social media. Women thrive on attention and these social media platforms give them copious amounts of it. Before the Internet, they had to actually go out and dress up and walk around and flirt with men to get this attention, and in a given year the average women might get a handful of men, either in her school, or work environment, or sometimes in the street, to give them the attention they crave. Now all they have to do is post a provocative picture online and sit back in their pajamas and watch the thirsty comments come rolling in. This reduces their desire to engage in actual socialization with the average man in real life, and when they do want actual sex or a relationship, and not just validation, they will narrow their focus to only a select few high-value men.
What comes to mind regarding this is that the traditional gender roles which were relevant 40 years ago are now mostly gone. Women do not have to rely on men as much as in the past. The value an average man provides to a woman's life has gone down.
There is an argument that women hypergamous which in my experience, from seeing how friends, coworkers, family members, friends of all these groups, picked their partners... generally it is the case they are in a very similar and close social standings. Often the man makes more money. Sometines the girl may be quite dominant herself and is with a guy who is not so dominant. But he makes it up with his leadership skills and taking charge or at least charting the course. He may have a fuckboy past so he is well equiped for handling her, even though he is not so dominant. I do not see that many cases where the man is a leagues above the girl.
So what is left for a man to provide to a woman?
There are traits like leadership. Something most women are pretty shit at and still rely on men to do. Vast majority of women want men to take care of things. I see this even in the smallest of things like when I go with girls to places, or I enter a train waggon, even if they are closer to the enterance, they slow down and let me go first. They don't want to deal with picking the spot. Also, you cannot lead very well if you do not have the experience, hence why a lot of dudes struggle. For me personally, this is one of the biggest things I still need to work on even though I am miles ahead than where I was years ago.
Next that I can see is "an experience". When I was going for oure coffee dates as this site suggested it did not work for me in 40% of the cases. When I paired it with walking through the city later, my chances went up.
Overall, I think there is some truth to one saying which is like "women catch men with their looks, men catch women with their lifestyle". Women want to feel and if a man provides a great experience for a girl, he has much higher chances with her. I saw some short clip of some guy talking about how he would seduce Kim Kardashian, and he basically said he would take her and go clean his car with her from mud, or something like that. Build a closet from ikea. He was making fun of a hypothetical guy taking her to a restaurant where she knows the owner or even has been many times.
But having and providing unique experiences is much harder nowadays I think. But then again, the experience is quite different depending on who you are with.
Great sex - I think generally they cannot get the same pleasure just from dildos. And if more guys are having less sex then they will be less experienced, less skilled, etc.
Sense of humor - from my experience, most women are not that funny. If you want to get that abs workout or almost pee yourself from the laughter, it is most definitely gonna be a guy who tells the joke. This plays into that unique experience.
There is probably more. But what I wanted to illustrate is that if an average guy needs to be above average, many dudes will do what you highlighted instead.