This form of selection is the one that the red pill and PUA are largely focused on. Darwin noticed that certain non-survival adaptations such as a peacock's tail could not be accounted for by natural selection. This is for the reason that a peacock in order to grow its impressive tail, makes itself less able to survive due to the impractical nature of the tail in addition to the resource expenditure to grow it [9]. An evolutionary biologist by the name of Ronald Fischer developed an idea called "The Sexy Son" hypothesis [10] and Fischer's principle [11]. The latter is that if male births are rarer than female births, then a newborn male has better mating prospects than a female, thus parents genetically predisposed to producing males will have more grandchildren born to them, which results in the genes for producing males become ubiquitous in the population and male births become more common. As the ratio of male to female births approach the 1:1 ratio, the benefits of producing males disappears. The same goes for female benefits.

The sexy son hypothesis, in summary is an hypothesis that a female's ideal mate choice between potential suitors is the one that will produce male offspring with the best chance of reproductive success.

"In a society where males compete with each other to be chosen as he-men by females, one of the best things a mother can do for her genes is to make a son who will turn out in his turn to be an attractive he-man. If she can ensure that her son is one of the fortunate few males who wins most of the copulations in the society when he grows up, she will have an enormous number of grandchildren. The result of this is that one of the most desirable qualities a male can have in the eyes of a female is, quite simply, sexual attractiveness itself." Richard Dawkins, The Selfish Gene [12]

If females choose physically attractive males, their sons will inherent their father's attractiveness, who are then chosen by females as mates, thus resulting in the initial female having many grandchildren. The theory functions as long as the trait(s) the female uses for selection are heritable, meaning that it differs among individuals in the population. Possessing the traits is what makes the man attractive not the qualities of the trait in itself. Once the preference has become established, females choosing males with the secondary sex characteristic will produce sons that carry the genes for it, and daughters who have the preference for it. This creates a self-reinforcing feedback mechanism that drives co-evolution of both trait and preference.

A related theory is the "Good genes" theory that proposes that females select males that are seen to have a genetic advantage that increases the quality of offspring, increased viability of offspring then provides a compensation for lower reproductive success that comes from being choosy about their mates [13]. Both theories assumes the existence of indirect genetic benefits that can compensate for any inferior direct reproduction success. The main difference between the two is that is that the sexy son hypotheses assumes an indirect effect due to the attractiveness of the sons, where the good genes focus on the viability of both sons and daughters. Attractiveness in this case can refer to any trait that increases the male's probability of becoming polygynous. For instance, research shows that human females are more attracted to "sexy sons" and men with traits indicative of high testosterone exposure during key developmental periods. during their high fertile period. While they are more attracted to men with more feminine faces during the remainder of the cycle.

Read the full essay here:http://blacklabellogic.com/2017/11/30/red-pill-logic-basic-premises-biology-part-1/