Why a curvaceous booty drives men wild

Men are naturally drawn to a woman with a curvy
backside , a new report suggests.
'Curvaceous gals'
The "theoretically optimal angle" is a 45.5-degree curve
from back to buttocks – not necessarily a big butt, the
University of Texas at Austin researchers determined.
These curvaceous gals would have had an evolutionary
advantage, in that they appeared able to bear multiple
children easily, the researchers said.
"This spinal structure would have enabled pregnant
women to balance their weight over the hips," said study
leader David Lewis, a UT Austin alumnus and now a
psychologist at Bilkent University in Turkey.
"These women would have been more effective at
foraging during pregnancy and less likely to suffer spinal
injuries," he said in a UT Austin news release. "In turn,
men who preferred these women would have had mates
who were better able to provide for foetus and offspring,
and who would have been able to carry out multiple
pregnancies without injury."
Evolved standard of attractiveness
This preference evolved over thousands of years and is
likely to persist for a long time, the researchers noted.
Their conclusions came from a two-part study in which
100 men were asked to look at images of women and rate
their attractiveness. Women with a 45.5-degree in the
lower back were rated as most appealing. The
researchers next determined from a group of 200 men that
guys preferred this degree of lower back curvature
regardless of a woman's butt size.
"What's fascinating about this research is that it is yet
another scientific illustration of a close fit between a sex-
differentiated feature of human morphology – in this case
lumbar curvature – and an evolved standard of
attractiveness," study co-author David Buss, a UT
Austin psychology professor, said in the news release.
"This adds to a growing body of evidence that beauty is
not entirely arbitrary, or 'in the eyes of the beholder' as
many in mainstream social science believed, but rather has
a coherent adaptive logic," he said.
The study was published online in the journal Evolution
and Human Behaviour .