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DNA that doesn't stray

Ladies, next time that cheating boyfriend comes home late one night, smelling of someone else's perfume and doesn't even deny cheating by exclaiming 'We're all animals, after all', we have scientific evidence that would debunk any such paper-thin reasoning and would leave you taking the moral high-ground. After you've kicked your love-rat partner to the curb, of course.

Whilst we may resemble our distant cousins in the animal kingdom during our less honorable moments, it is because of this very reason that scientists at the Florida State University have discovered that men in a relationship are biologically and physiologically not attracted to females at the most (ahem) productive part of their menstrual cycle. Men who are free and single, however, are chemically drawn in by this pheromone-type response immediately, Marie Claire reveals.

'The evolutionary mating game wasn't just about finding a [hottie] in the savanna's equivalent of a singles bar. Natural selection favored those who stayed together long enough to raise children: the men and women who could sustain a relationship by keeping their partners happy. They would have benefited from the virtue to remain faithful, or at least the wiliness to appear faithful while cheating discreetly'.

But what genes are responsible for excessive alcohol consumption, inability to participate in housework and persistent inclination towards sport?

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