Discussions like this drive me crazy. It's not hard to see what it is about society that's making so many people not have sex, and it's not, like, some subtle market effect involving their attractiveness. No matter how much you want find a market effect, it's due to _human stuff_, like people's actual lives and problems, not their behavior in some sex economy. There is nothing even close to an economy around sex. There's just the real world.

(This kind of) economics is valuable when it can tease out and explain underlying trends that you can't figure out from just looking at the world. But in this case, the only thing you'll be missing if you proceed by intuition is, like, numbers on the size of the effect. If you want to solve the problems at a societal level, while numbers are useful for prioritization, maybe, you're going to be trying to solve the actual problems that you identify with your human analysis.

For instance living in this world provides me ample evidence to dismiss the line "It also won’t do to point to changes over this time period that effected all ages and genders similarly, such as obesity, porn, video games..." as laughable and clueless with, say, 99.99% confidence.