Notes on hydration and sexual reciprocity in females

This is a bit of a weird hypothesis.

:: AVP and OTC 

So we have this signalling token called Antidiuretic Hormone / ADH a.k.a. Arginine Vasopressin / AVP ... which translates as "anti-pissing hormone", which of course is triggered when we've pissed too much, and the relevant receptors detect hypertonicity ( paraphrased : thickness of blood ). AVP has a much more popular sibling called Oxytocin / OTC which is inaccurately popularised as "the love hormone". 

I say that is inaccurate, because it overemphasises the positive connotations without neutralising the concept of love within an objective context : AVP and OTC systems interact antagonistically, but both contribute to ingroup-vs-outgroup behaviour in humans. And these systems both evolved historically from systems using the signalling token vasocitin which remain today in non-mammalian vertebrates ( those less fuzzy, less milky, yet boned animals ). Both AVP and OTC have a short plasma half-life.

:: OTC

OTC is released, among other triggers, by social touch, in both males and females. OTC release is correlated with, and possibly causal with regards to orgasm/ejaculation in both males and females. In females it seems possible that it might form a positive feedback loop ( OTC > arousal -> orgasm -> more OTC ), corresponding with the female experience of increased sexual arousal after orgasm.

:: AVP

Anyway, it appears that AVP features prominently in the vasoconstrictive sexual erection response of human males ... and then it just falls off a cliff upon orgasm/ejaculation ( the two are not the same, but that stands to be finessed ) : correlated with the "refractory" period. Meanwhile AVP just doesn't spike in human female sexual response - in fact it is possibly negatively correlated with female sexual response, as it orientates behaviour towards outgrouping.

:: Herein the stupid hypothesis : 

If you're courting a human female, it might help if you keep them adequately hydrated to minimise vasopressin-induced stress on their system. Conversely if you're a human female seeking to maximise outgroup skepticism, it may help to stay slightly dehydrated. 

:: Links

1 : The Oxytocin-Vasopressin Pathway in the Context of Love and Fear https://www.sciencedirect.com/science/article/pii/S2050116121000507

2 :  How Relevant is the Systemic Oxytocin Concentration for Human Sexual Behavior? A Systematic Review https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5743651/ 

3 : Endorphins, oxytocin, sexuality, and romantic relationships : An understudied area https://www.wjgnet.com/2218-6220/full/v7/i2/17.htm

4 : various ; links above provided as key examples only

:: Pointers to Other Signalling Tokens

AVP and OTC systems interact with Nitric Oxide / NO systems, and various other signalling tokens in the body. How inconveniently ... complex. AVP is a vasoconstrictor, whereas OTC and NO are vasodilators : it should be noted that vasoconstriction/dilation is definitive in some cases, and otherwise correlated with the concept of organismal stress, also sexual response.

Dopamine may be regarded as a "reward" molecule, and it gradually increases in both males and females during courtship/arousal, peaking at the point of orgasm. There's a supply-chain that goes "tyrosine  > dopamine > noradrenaline > adrenaline". Adrenaline and its trusty sidekick noradrenaline are involved in a whole bunch of schenanigans, redacted.

Serotonin may be regarded as a "satisfaction" molecule, and it tends to kick in after orgasm, telling you to chill and you can stop bangin now. I haven't written any note here on the sympathetic and parasympathetic nervous systems yet, nevermind ... that's not the main point of this article.