Here’s a weird thought out of left field. Can the four classical humors—blood, yellow bile, black bile, and phlegm—be mapped to high/low pH and metabolism? Who knows? Certainly not me, I’m just this guy. Here’s how I’d wager though:
Sanguine: Alkaline, high energy
Choleric: Acidic, high energy
Melancholic: Acidic, low energy
Phlegmatic: Alkaline, low energy
Here’s how I expect the two axes to behave, psychologically:
Acidity: Promotes mental focus, critical realism.
Alkalinity: Promotes holistic thinking, optimism.
High energy: Strengthens desires, compels quicker judgments.
Low energy: Weakens desires, induces perfectionism.
I’d expect testosterone to boost metabolism and slightly boost acidity, whereas I’d expect estrogen to boost alkalinity. In general, these are my feels for set points in the genders:
Civilized man: Choleric
Civilized woman: Melancholic
Natural man: Sanguine
Natural woman: Phlegmatic
Here’s how I figure this changes in response to the Pyrrhic cycle.
Lawless, faithless: Men tend to be more phlegmatic, women tend to be more melancholic.
Lawless, faithful: Men tend to be more sanguine, women tend to be more phlegmatic.
Lawful, faithful: Men tend to be more choleric, women tend to be more sanguine.
Lawful, faithless: Men tend to be more melancholic, women tend to be more choleric.