SNS x PSNS : and sex

Imbalanced sex overstimulates the sympathethic nervous system/ SNS, and keeps me awake. Vagus nerve ( parasympathetic/ PSNS ) stimulation is quite important for getting rested. Or something like that. 

Sex, masturbation, physical exercise, whatever. I find that my neural focus should be on the PSNS because I spend most of my normal life activating the SNS.

That's why developmental athletics competes with book work for me, it's alll SNS. I don't eat or socialise to relax much, except for sex.