Funny thing is… there isn’t. Its easy for a woman to get laid if she chooses to. She can go on any dating app, like bunch of dudes and an average girl could easily have a different guy every night.
The single female population, albeit sizable too ofc, hasn’t had much of a change as a percentage over the years. Single male population is however skyrocketing.
Two thirds of male under 30 are single. But only one third of female under 30 are single over a past year of time. You could theorize women are simply dating older now, which may be true, but wouldn’t account for such drastic disparity. Also this gap exists in 30 to 40 bracket too, though much smaller.
Most simple answer is that they’re sharing men, whether they realize it or not.
We know from dating apps that vast majority of women only select on very few percent of men. So the most attractive men are essentially having multiple women at the same time or at round robin (it’s not cheating). Polygamy is pretty much coming back. In some other countries like china, polygamy has become an open secret for the rich.