I'm going to repeat something that should be base. Hypergamy is a word. Why? Because there is no observation or record of seeing a certain behavior? Hypergamy IS often used as an excuse as to why someone is an incel or an AFC. It often IS used as cope. That doesn't "prove" it doesn't exist. That's a complete reversal of a burden of proof.
Further, sexual activity or frequency of said activity does not indicate who you had or who you did not have sex with.
How about this? Let's say all one has to do is pull out your phone, get on the PC or watch tiktok to see something hot enough to bust one out to? You don't have to buy magazines anymore or go to those adult dvd stores. That, and you've got dweebs dusting themselves off by watching pre recorded stuff on OF for little money. When you've got dudes out here who are increasingly seeing less of a point in "performing" like a circus monkey to get some poon, there's less guys women are going to want to bang.
Like it or not, women make the decision on who bangs and who doesn't. Therefore, she has to want you to! Women don't want to have sex with incels or AFCs. So who aren't incels or AFCs? People who are out there being social, who have developed an actual personality, know who the heck they are and who they'd like to be, and yes... Even who they'd like to be with. Most of the time that's not with an overweight woman with an unchecked attitude who is blissfully unaware of its existence.
Is it plausible that this explanation and social situation (AKA 'battle of the sexes') could point to the conclusion less people are having sex? I certainly seem to think so. Hypergamy only suggests that a woman will seek someone she deems as valuable, worthy, whatever word you want to call it. It makes no point in quantifying the amount of sex. Although it should be obvious that almost any woman isn't going to find a fat dude who is 5'3" working part time at sonic, is 26, lives with his folks, drives a 98 Neon and only has video games as a hobby to be sexy.
It's also absurd to suggest that a man would pick a woman who is 45, has 3 kids, is 30-60lbs overweight and is a proclaimed feminist out of a lineup containing 50% of the same and chooses to shoot his shot with women who are almost always going to say no. It also makes sense for men who aren't even incel or AFCs to pretend or pose long enough to bang someone and then scram regardless of what he doesn't like. I've been a complete idiot just to get some. I think a guy that says he never has just never has period. But that's just my opinion on that one statement.