Two books I highly recommend look at the academic literature that investigates the biological and neurological differences between men and women...amazing stuff and definitely an area that needs more consumer behavior research!!
Sex On The Brain by Deborah Blum
The Essential Difference: The Truth About the Male and Female Brain by Simon Baron-Cohen
Sex On The Brain by Deborah Blum
The Essential Difference: The Truth About the Male and Female Brain by Simon Baron-Cohen