Morphological Variation and Sexual Behavior in the Human Past : I. The Sexual Activity and Pelvic Morphology of East Asians : An Approach to Assess Sexual Activity in Fossil Records
The behavior, involving in a reproductive strategy was the crucial element of global population expansion in the human past. However, due to the lack of a procedure to assess sexual activity in fossil records, such an involvement is poorly understood. To establish an assessment procedure, I re-examined the hitherto observed results of hormonal analyses, sexual behavior surveys, the comparative study of reproductive organs and the pelvic structures in current different populations. It was noted that a pelvis with the long pubis was frequently seen in East Asian females, whose male partners were sexually least active. Whereas a pelvis with the short pubis was often seen in the females of the other populations in which their male partners were sexually more active. Although the dependency of pubic length on body size can not be ruled out, the possibility has been raised that the pelvic variation in females was associated with the sexual activity of their male partners. A proposal was made that male sexual activity may be indirectly assessed by the pelvic variation (in terms of pubic length) of female partners in fossil records. Using the new procedure, the sexual activity of Palaeolithic specimens, e.g. SH Pelvis 1, was inferred
