This article was written by Markham Heid and provided by our partners.
It's no secret that many men love a full tush—but why? It may be because women with curvy behinds made better nomadic child-bearers back in the day, according a new study from the University of Texas.
You’ve probably never thought about "lumbar curvature" or "vertebral wedging." But the study authors have. And their research shows men tend to go gaga over a woman with the type of spine curvature that makes her butt seem to pop out or protrude.
If you're like the average man, you're especially attracted to a woman with a spine that curves roughly 45 degrees above the top of her butt, the research shows. "This degree of curvature would have enabled ancestral women to shift their center of mass back over their hips during pregnancy," says study coauthor David M.G. Lewis, Ph.D.
Back in hunter-gatherer times, human beings were constantly on the move. Staying still was a death sentence. So women who could keep walking long distances even while very pregnant had an advantage in terms of reproduction and survival.
Lewis says a 45-degree lumbar curvature allows a woman to carry the weight of her unborn baby in a way that makes her less vulnerable to spinal injuries than women with more or less curvature. Thousands of years ago, this would have helped her to keep moving and foraging during the later stages of pregnancy—a huge plus, says Lewis.
Apparently, modern man hasn't lost his taste for curvaceous, baby-bearing derrieres—at least according to this research.
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