Earlier quoted context omitted.
Because why else would such an aversion arise? I don't think there are any sensible "defaults" for human cultures. But I wouldn't expect aversion to talking any sex to arise spontaneously among a population that hadn't had it imposed by prior generations or from outside. We're naturally curious beings and have lots of sex (compared to other species).
>Because why else would such an aversion arise? Because it promotes social stability ? As much as I dislike defending religion - those values produced the most stable societies through history
I don’t actually think the answers to these questions disprove your statement, because I have a painful lack of knowledge as to what those answers actually are. But I do feel that those answers need to be given before an argument such as yours can make sense.
(Granted, a trait that promotes societal stability can become common even if stability isn’t actually good, so the last question is not as important as the others. A dystopian equilibrium is still an equilibrium.)