Men find a 45.5-degree back-to-buttock angle optimally attractive, independent of buttock size; psychologists theorized that this vertebral architecture would have allowed pregnant women to forage without suffering lumbar injury.
Men find a 45.5-degree back-to-buttock angle optimally attractive, independent of buttock size; psychologists theorized that this vertebral architecture would have allowed pregnant women to forage without suffering lumbar injury.