Man and Woman - Pfaff, PhD, Donald W. (Professor and Head of Laboratory, Neurobiology and Behavior, Professor and Head of Laboratory, Neurobiology and Behavior, The Rockefeller University, New York, NY.)

Genes and environment interact inside and outside the brain to produce hormonal and neuroanatomical and neurochemical differences between men and women. These factors dictate small differences in ability and large sex differences in feelings, in pain and in suffering.