Big Butts, Study, Kim Kardashian, Womens Health, Female Behind, Beauty

For centuries men have been all about the butt, and the bigger the better. But new research has revealed that the reason behind men’s interest in a prominent backside stems from evolution, and might actually come down to a curved spine as opposed to how much junk a women might carry in her trunk.

RELATED: Mons Pubis: The New Thigh Gap

“What’s fascinating about this research is that it is yet another scientific illustration of a close fit between a sex-differentiated feature of human morphology — in this case lumbar curvature — and an evolved standard of attractiveness,” said the study’s co-author and psychology professor, David Buss.

“This adds to a growing body of evidence that beauty is not entirely arbitrary, or ‘in the eyes of the beholder’ as many in mainstream social science believed, but rather has a coherent adaptive logic.”

The study, which was published online for Evolution and Human Behaviour, saw more than 300 men rate the attractiveness of female silhouettes that had curvatures ranging from 26 to 61 degrees. Most men had a preference of 45.5 degrees, which scientists insisted was the optimal angle for ancestral women to forage productively and carry children.

Big Butt, Female Behind, Beauty, Kim Kardashian, Study, Womens Health

“These women would have been more effective at foraging during pregnancy and less likely to suffer spinal injuries,” said study lead David Lewis in a statement. “In turn, men who preferred these women would have had mates who were better able to provide for foetus and offspring, and who would have been able to carry out multiple pregnancies without injury.

“This tight fit between evolutionary pressures and modern humans’ psychology, including our standards of attractiveness, highlights the usefulness that an evolutionary approach can have for expanding our knowledge not just of the natural sciences, but also the social sciences,” he concluded.

So in other words, according to scientists, our concept of beauty might be reverting back to evolution in which a beautiful woman was someone who could bear healthy children and remain active while pregnant. Does this mean we will be seeing a rise in spinal shaving surgery procedures as opposed to butt implants?

The Nature World News reported that a 45.5 degree curve makes a female’s behind look larger, because it protrudes more obviously than a smaller curve – this is despite how full her posterior might be. So perhaps a word to Kim Kardashian: It’s your spine that men are attracted to, not your perky, peach shaped and fuller backside.

 Images via Shutterstock and eurekalert.org