Another simple one, but I’m proud of it. I might have already written it somewhere, but whatever, fuck it.
Here’s the skinny: most men can’t have sex while their amygdalas are firing. This is a good safety mechanism, as you wouldn’t want to be having sex while in an environment that inspires fear or disgust. But sex is a messy business, and once you get going the amygdala is actually programmed to shut down because the grossness of sex would otherwise be a disgust trigger, and therefore a turnoff. Paradoxical, but you can ask any eight year old and they will tell you that yes, sex is objectively gross. If we still desire sex, it is because we are able to ignore this.
Anyway, species with larger amygdalas and higher IQs will tend to have sex and children less often, even if it’s freely available, because future threats seem more immediate and scary to them. They are less able to live “in the moment” or turn off their general, base-level anxiety. Within a K-selecting environment, this is sufficient to create an upward spiral of intelligence and amygdala size while intelligent, forward-thinking, paranoid macrofauna are more successful than fast-breeding microfauna and parasites. So intelligence and fear work together as the mechanism that actually produces K-selection within the proper environment.
To illustrate, a paranoid man will actually be disinclined to have sex if he has not already gathered enough supplies to last through the next harsh winter. In contrast, a careless man may have lots of sex and several children by several women, but in this K-selected environment he and his sluts and his children all die in the next winter because they haven’t properly prepared like the paranoid man has.
But having a big amygdala can definitely backfire, if it never gets a strong enough kill signal during sex. In such a case, a person would be unable to overcome their gag reflex in order to copulate. In point of fact it’s fairly common for geniuses on the extreme end of intelligence to be disgusted by sex, and to be virgins for this reason rather than general dysfunction. Sidis was one of these, and I suspect Newton was another. Furthermore, such a person would retain their redirected sex drive (and according to NH whackos a bunch of metaphysical stuff that I know nothing about) and probably express it in a neurotic manner. Hence all sorts of strange, sterile, nonthreatening/nondisgusting fetishes.
This naturally raises the question of what causes the more common fetishes that cause fear and/or disgust, like pooping on chests and licking feet and S&M. I confess I don’t have a theory for that yet, but it seems to be at least partially accounted for by the war bride/rape fantasy theories espoused by androspherians.