We sleep on it, mindful of diurnal variation in what is unconscious.

What is unconscious to a male can be conscious to a female, as suggested by “…our great captain’s captain,…”.
While it is true that what is unconscious to a male can be conscious to a female, it is also true that what is conscious to a female is subject to hormonal variations.
For a woman who wants children to have sex during the infertile phases of her menstrual cycle, is for her to incur unnecessary biological costs, and thus to reduce her fitness in the present.
Ejaculation in human males is followed by a surge of release of the hormone prolactin, which is associated with parenting behaviour in birds and animals.

Males who avoid competitive females may sense conflicts about gender physiology. Feminism risks speciation, the moreso because the internet has made it easier for males to offset their visceral needs privately, facilitating mirror neurones. The marriage rate and the birth rate are both in decline.

Light therapy has been used to treat winter depression, theoretically to reduce the level of the hormone melatonin, which normally induces sleep.

The onset of puberty may be explained by progressive reduction of inhibition of the gonadotropin-releasing hormone (GnRH) cells in the median eminence of the hypothalami through involution of the pineal gland, which calcifies from adolescence after a decade of exposure to light through bilateral circuits from the retinae, the paraventricular nuclei of the hypothalami, the superior cervical ganglia and the nervi conarii: there is a commensurate reduction of melatonin, and this disinhibits the GnRH cells. The onset of puberty is earlier in tropical countries compared with temperate countries.

Claims that the human hormone oxytocin has affiliative effects in humans have shown a familiar sequence of initial enthusiasm about situational studies that have been peer-reviewed credulously, followed by circumspection after the passage of time and critical overviews.


Failure to control for hormonal variations is not uncommon in notionally scientific studies.