When Meghan Trainor sang that may be men are all about that "bass", she may be onto something.
A recent study was conducted by the University of Texas at Austin and was published in Evolution and Human Behavior, stating that men find women with curves more attractive. But the interesting this is, those curves are neither breasts or buttocks. In the study process, 100 men were presented photos of women's bodies, each having a different angled spine curvature. Most of them found images of women’s bodies with a larger angle more attractive.
To strengthen the study results, UT Austin alumnus and Bilkent University psychologist David Lewis conducted a second study. This time he wanted to know whether it’s bigger booties that men prefer or just the 45.5 degree spine curvature. 200 men reviewed images of different women, all with differing buttock sizes and varying spine curvatures. In the study conducted, most men preferred the images of women with the optimal spinal curve — regardless of the butt size.
Eric Russell, the study’s co-author said in a University of Texas press release: “This enabled us to conclusively show that men prefer women who exhibit specific angles of spinal curvature over buttock mass.”
Via UT News
But that wasn't just enough to be known!
Further research justifies the biological preference, stating that since women with the optimal spine curves were more apt to carry the weight of a foetus during pregnancy, they make relatively more suitable mates. "Men who preferred these women would have had mates who were better able to provide for fetus and offspring, and who would have been able to carry out multiple pregnancies without injury," Lewis stated in the UT press release.