It’s dead on balls accurate. Thanks for opening up and sharing your worldview.
This is a referrence to the old medical belief that the body had four humors. An imbalance in humors not only caused illness, but determined personality.
From Charles Panati’s Extraoridnary Endings Of Practically Everything And Everybody
For instance: Sanguis is Latin for “blood”(the red humor), and a sanguine woman had a cheery, optimistic outlook on life, was a warm and loving mother, a passionate wife, of sturdy health, and had a ruddy complexion to prove it. It would be her misfortune to marry a choleric man, for cholera (Latin for “jaundice” and the yellow humor) characterized not only his pasty, yellowish skin, but also his bilious temper, arrogance, and vaingloriousness; if crossed, the choleric man was shrewd and vengeful.Phlegma is Greek for “inflammation” and hence characterized the thick, mucous secretions (white humor) from a cold. Thus, the phlegmatic man had a thick build, clammy palms and forehead, was sluggish, dull, and impossible to interest in any subject. Melanos is Greek for “black” and a melancholic woman shed an excess of black bile from her kidneys, spleen, and pancreas, which did not make her easy to live with. Relentlessly sad-spirited, she rose from gloominess only to express irritability, plunging back into depression.