Note that I specifically said above that the OKCupid essay's "conclusion is correct." You're confusing criticizing an argument form and criticizing a conclusion. Consider the following exchange:
Person A: Karl Marx was an evil person, therefore communism is wrong.
Person B: That's an example of the ad hominem fallacy, and so an invalid argument.
Person A: How dare you say communism wasn't wrong, you Stalinist pig!
Posting statistics about exactly how many people were killed in communist regimes does not make A's argument valid, or B's criticism wrong.
Why don’t men go for younger women? That’s not quite accurate, because they do, but we seem to have a cultural norm against girls who have recently exited puberty, even though they are highly fertile. Some time in the last few hundred years, we reached a cultural norm that as a man gets older, it’s increasingly less appropriate for him to be with a sixteen year old. That’s not long enough to override thousands of years of evolution, so what could have contributed to it?
The best solution I’ve heard started by looking at who benefits from this norm [older women] and wondering whether they could have contributed to it. After all, the strength of this norm has been increased in the last sixty years or so, which coincides with the period in which women’s power has increased.
One alternative I heard recently is that it doesn’t make sense biologically to go for women who are recently post-pubescent, as they don’t make the best mothers. Instead, a slightly older woman [mid-twenties] makes sense to be the best mother. This is perfectly plausible.
Another, less plausible, suggestion I’ve heard is that it’s to do with mental capacity. I find this unconvincing because we have few objections to a high-status man dating a beautiful but low-intellect woman.
Thoughts?