“The authors’ other argument is for the supposed social-bonding role of sex but how many ancestral males would choose to ‘socially-bond’ with a middle-aged or post-menopausal female when there are younger alternatives screaming out for ‘social-bonding’ elsewhere – young females who, according to Ryan and Jethá, were not letting their minds get in the way of all that ‘social bonding’. Back in the real world, as we have seen, the extensive human social networks are enabled by pair bonds, and our extra-marital sex is mostly about females acquiring meat or other resources and occasionally about men bonding by ‘sharing’ women for their own interests with little if any concern for female choice or female well-being.”

“They tell us that women make loud noises during sex “from the Lower East Side to the upper reaches of the Amazon”, overlooking the fact that as far as the Amazonian tribes are concerned, signs of female sexual enjoyment are sometimes discouraged and the existence of the female orgasm is often not even recognized. In all of these tribes where we have had the information, female sexual pleasure is either a non-issue, discouraged, or sex is as private and as quiet as possible.”

“It is back to basics here,’ Jason said. ‘What women seek to find in a man is dictated by evolution and the role of the man as a hunter gatherer. Women want a bad boy who will treat them well but not so well that they will have nothing to bitch about to their female friends. Bitching about the male of the species is how females bond with each other…another one of evolutions little jokes.”

“Simone de Beauvoir in The Second Sex lamented how “the woman is adapted to the needs of the egg rather than to her own requirements”. We did not then understand how males too are adapted to the needs of their gametes rather than their own requirements. Men can more easily feel rewarded for serving the needs of their sperm; rewarded time and time again for every successful ejaculation. The ‘natural’ downside for men and males in general is competition with other males, injury, possible exclusion from any mating opportunities, more illness than females, and shorter lifespans.”

“Ryan and Jethá propose that our ancestors, at least from 200,000 years ago, were living in a world of plenty where the resources of food and sex were in abundance but were choosing to stay hungry. After a couple of hundred thousand years of this ‘Eden’ we apparently forgot who we were, got our appetites back, and before we knew it we were drowning under babies we no longer chose to dispose of at birth.”

“Again they mention the Siriono who, they say, rarely if ever lack for sexual partners and where sex anxiety seems to be remarkably low. Recall that the Siriono live in small inbreeding groups under one roof and in a constant state of hunger, which makes food anxiety their main experience. Men use food to get sex, women are subservient, marriage is monogamous or polygynous, and women receive the blame for all adultery which is hidden as much as possible. A man alone with a woman in the forest may throw her to the ground and have sex with her without so much as a word. Sex is generally a violent and rapid affair, and while kissing is unknown, biting occurs.How would it feel to live in such a world, Ryan and Jethá ask. Hungry, probably, and not that great for women.”

“Male love circuits get an extra kick when stress levels are high. After an intense physical challenge, for instance, males will bond quickly and sexually with the first willing female they lay eyes on.Women, by contrast, will rebuff advances or expressions of affection and desire when under stress. The reason may be that the stress hormone cortisol blocks oxytocin's action in the female brain, abruptly shutting off a woman's desire for sex and physical touch.”