Men's preference for women with curvy backs has evolutionary roots

A new study has revealed that today's preferences of men for women with a curvy backside have evolutionary roots.

The study conducted by The University of Texas at Austin explained that men's mate preference for women with an optimal angle of lumbar curvature, i.e. a 45.5 degree curve from back to buttocks allowed ancestral women to better support, and carry out multiple pregnancies without injury.

David Lewis, Bilkent University psychologist said that ancestral pregnant women with a spinal curve of 45.5 degree were able to balance their weight over the hips and have been more effective at foraging during pregnancy and men who preferred these type of women would have had mates who were better able to provide for fetus and offspring.

The study also observed that men preferred this particular spinal angle over buttock mass regardless of the size of the buttocks.

David Buss, study's co-author said that their study showed a close relationship between sex-differentiated features of human morphology and an evolved standard of attractiveness, and also that beauty doesn't lie in the eyes of the beholder, but rather has a coherent adaptive logic.

The study is published online in Evolution and Human Behavior.