AS reports that the BBC is doing social studies, now, via online surveys, coming up with brain differences, sorted by gender.
Separately, the DC Madam case has brought up statistics of interest. Nature or nuture, you make the call:
Statistics show, that regardless of current laws and enforcement policies, buying sex is still popular: nearly 13 percent of American men say they have exchanged money for sex at some point in their adult lives, according to a 2004 survey. By comparison, 1.2 percent of women answered yes to the question, according to the National Opinion Research Center at the University of Chicago, which conducted the study.