NEW YORK —Why do most men prefer ladies with curvier bodies, especially sharp curvy hips? According to a study, modern man’s this preference has ancient evolutionary roots.
According to a research carried out by a team from the University of Texas (UT) at Austin and the UT – Arlington has found that for a mate, man preferred a woman with a “theoretically optimal angle of lumber curving,” a 45.5-degree bend from back to buttocks allowing ancestral women to better support, provide for, and carry out multiple pregnancies.
“The findings enable us to conclusively show that men prefer women who exhibit specific angles of spinal bend over buttock mass,” said study’s co-author Eric Russell from the UT – Arlington in a paper published in the journal Evolution and Human Behavior.
This investigation consisted of two studies. The first looked at vertebral wedging, an underlying spinal feature that can influence the actual curve in women’s lower backs.
Around 100 men rated the attractiveness of several manipulated images showing spinal curves ranging across the natural spectrum.
Men were most attracted to images of women displaying the hypothesized optimum of 45 degrees of lumbar curvature.
This adds growing body of evidence that beauty is not entirely arbitrary or “according to the viewer” as many in mainstream social sciences believed, but instead has a coherent adaptive logic, added psychology professor David Buss from the UT Austin.
“This spinal structure would have enabled pregnant women to adjust their weight over the hips,” the authors noted.
These women would have been more effective at foraging during pregnancy and less likely to suffer spinal injuries.
Thus, men who preferred these women would have had mates who were better able to provide for foetus and offspring, and who would have been the able to carry out multiple pregnancies without injury.
The second study addressed the topic of whether men prefer this angle because it reflects bigger buttocks, or whether it truly can be attributed to the angle in the spine itself.
Around 200 men were presented with groups of images of women with differing buttock size and vertebral wedging, but maintaining a 45.5-degree curve.
Men consistently preferred women whose spinal curvature was closer to optimum regardless of buttock size.Follow @gorkhapost
Sleep well for sexual pleasure
NEW YORK — A good night’s sleeps revives you for the day as well as gives you an extra strength in your sex life, according to a new study.
David Kalmbach from the University of Michigan Medical School has found that every extra hour of sleep improved the livelihood of sexual movement with a partner by 14 percent.
In a study of 171 women, those who obtained more sleep on a given night experienced greater sexual desire the next day.
“If you are having issues in the room, one of the things to consider is, are you sufficiently getting sleep,” Kalmbach asked in a paper that appeared in the Journal of Sexual Medicine.
Sleep was also essential for genital arousal, such that women who slept longer on average experienced fewer problems with vaginal arousal than women who obtained less sleep.
Kalmbach said his findings covered well slept women over the time.
“The impact of sleep on sexual desire and arousal has received little attention in the field, but these findings show that inadequate sleep can diminish sexual craving and arousal for women,” Kalmbach added.