Amazon.com description: Product Description: Erotic Sympolism, the mechanism of detumescence, the psychic state in pregnancy "The origin of these Studies dates from many years back. As a youth I was faced, as others are, by the problem of sex. Living partly in an Australian city where the ways of life were plainly seen, partly in the solitude of the bush, I was free both to contemplate and to meditate many things. A resolve slowly grew up within me: one main part of my life-work should be to make clear the problems of sex. That was more than twenty years ago. Since then I can honestly say that in all that I have done that resolve has never been very far from my thoughts. I have always been slowly working up to this central problem; and in a book published some three years ago—Man and Woman: a Study of Human Secondary Sexual Characters—I put forward what was, in my own eyes, an introduction to the study of the primary questions of sexual psychology."