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.