A new study found that sexlessness is at an all time high. Here are what I believe to be some of the main reasons for it:

1.) Online Dating: Private studies and data released by OLD apps such as Tinder and OKCupid have shown that response rates differ dramatically in favor of women. This means women have way more options than men in OLD; Which in turn means they discriminate much more heavily in who they respond to, and only end up responding to the top 5-10% of men on the platform; Which means the bottom 90-95% of men get literally 0 responses.

The flip side, however, is that this means the top 85-90% of women are competing for these same 5-10% of men, giving those men virtually unlimited options. And since these men will usually date down a few points for casual, but not long term, it leads to the top 30-35% of women getting at least 'some' action, but then most end up being left feeling used and jaded when those same men inevitably ghost them because they weren't serious, and so they begin to check out of dating altogether too. It's a coin with two shitty sides that affect both men and women negatively.

2.) Women in the Workforce: Before reliable birth control, women had to depend on men for provisioning, for both themselves and their offspring. But as more and more women have control of their reproduction (not a bad thing), and are able to work and support themselves (also not a bad thing), then there are simply less things that men can bring to the table that a woman actually sees as adding value to her life. (Again not a bad thing.. just the way it pans out). This generates a much larger pool of men, usually the lesser physically attractive and only moderately educated ones who would have still previously been able to earn the affections of a mate through his provider/ husband/ father capabilities, that now simply have nothing to offer. Again, this is a side effect that impacts both the men who have nothing to offer, and the women who are choosing to remain single because of it.

3.) Men and Women Value Different Things in a Mate: High earning or high status men will typically date a lower earning woman, since they tend to value different things in mate for evolutionarily instantiated biological reasons (The Evolution of Desire, Gary M. Buss). High earning or highly educated woman typically will not date a man of lower education, wealth, or status than themselves, as they tend to put a higher valuation on those qualities in a potential mate for the same evolutionary reasons.

Similar to the last point, as more and more women outperform, or at least perform at the same level as their male counterparts in both higher education and earning potential, and as more and more of those high power jobs go to women instead of men, then there are less and less men above these career oriented women in their ever shrinking dating pool, and the sea of 'undateable' men below them just becomes wider and wider.

Again, as with online dating this is a double edged sword. Since top achieving men are exceptional virtually definition, this makes their actual numbers exceedingly small at a population level. Which means that the competition to win the affections of those men is absolutely fierce beyond belief, and most women in that space will lose out as a matter of mathematical certainty, and either end up alone (by choice) or be forced to accept a raw deal by'settling' for a lower earning partner.

4.) Political Climate: In the era of #MeToo, where traditional masculinity is labeled as toxic and men can be accused of misconduct for daring to even make unwanted eye contact or approaches to woman; Where universities and other institutions are debating whether or not a woman can retroactively withdraw consent days, weeks, months, or even years after intercourse and credibly accuse a man of rape; Where the legal system, especially family law, is biased heavily in favor of women, and a man can lose his livelihood and even his freedom at the whim of a maliciously acting woman... Many men are simply deciding it's no longer worth it, and instead opting to not compete in the hierarchy altogether. If this trend continues it will only exacerbate the three issues described above as the pool of 'dateable' men will become smaller and smaller, leaving the majority of women who just want to find a partner in the lurch too.

EDIT: 5.) Many commentors have listed young men still living with their parents or being addicted to porn as causes of the decline in sex being had within that demographic, and while I agree this does exacerbate the issue, I would posit that it's actually a symptom and not a first cause. As the points above cause more and more young men to feel as though there is little to nothing that they can do to compete in the dating marketplace, or that it would be too dangerous or costly to even try, they simply give up altogether, release themselves of their burden of performance and competition, and retreat into their second lives of entertainment and escapism (drugs, video games, porn etc). Here is an article that was printed in the Economist that breaks is down in more detail: https://kortina.nyc/essays/kinky-labor-supply-and-the-attention-tax/

In closing, I don't know what the solution is, as nobody is advocating that women should return to a state where they do not have control of their reproduction or means of supporting themselves and managing their own finances. But I do know that in the last 60 years technology has undone traditional gender roles around sex, dating and relationships that have existed for millennia due to deeply rooted biological and evolutionary reasons, and significant evidence indicates that, at least so far, it is not being experienced as a net positive for either men or women.. or the longevity of western civilization for that matter.