If there's one question we never tire of, it's whether men and women speak or feel or think in fundamentally different ways. Do women talk more than men? Are their brains hard-wired for empathy? Can innate differences explain men's and women's career choices? This is today's iteration of Mars and Venus, and it's everywhere.

A study has found that men with the "dark triad" of traits – narcissism, thrill- seeking and deceitfulness – are likely to have a larger number of sexual affairs.

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A woman who walks with a seductive sway of her hips is unlikely to be ovulating, a finding that sheds light on the complex sexual signals that women give to men, New Scientist reports.

Why Beautiful People Have More Daughters: From Dating, Shopping, and Praying to Going to War and Becoming a Billionaire — Two Evolutionary Psychologists Explain Why We Do What We Do. Written by Satoshi Kanazawa and Alan S. Miller, the book finds answers not in ids, egos and superegos, but in the evolution of the human brain. Written in snappy prose, their argument is essentially that our behavior — our wants, desires and impulses — are overwhelmingly shaped by the way our brain evolved 10,000+ years ago, and one consequence is that our ancestral brain is often responding to a world long ago disappeared, not the modern, fast-changing world in which we live. This disconnect can lead us to be out of sync, to act in ways that seem inexplicable or counter-productive, even to ourselves.

The genes that underpin schizophrenia may have been favoured by natural selection, according to a survey of human and primate genetic sequences. The discovery suggests that genes linked to the debilitating brain condition conferred some advantage that allowed them to persist in the population — although it is far from clear what this advantage might have been.

A New York State University team quizzed over 1,000 students, finding women place a big emphasis on kissing.

Why most suicide bombers are Muslim, beautiful people have more daughters, humans are naturally polygamous, sexual harassment isn't sexist, and blonds are more attractive.