>>142867041 For one, our lust just doesn't respond to non-social non-internal factors; the moon or the seasons don't matter for that. Women have their inner clock though, for being in heat. And is about monthly.
2 But say for the sake of argument, that we were compelled biologically (but by external seasonal factors), to mate only in certain times of the year. And keep in mind that human non-sexual behavior is not compelled by nature as heavily as other animals; we create our own food by farming and agriculture. But the influx of resources is semi-constant, the most important factor is social. By occupation, people have their active, free, and collection days at arbitrary times of the year.
3 From the previous point, there's two factors to mate. And not only when both meet we mate (you could feel not too horny, and still have a perfect social opportunity.)
4 So even if we had an ideal natural mating season, it wouldn't be noticeable with humans of the last few thousands of years.