During the past decade the subject of sex and its associated reactions has been more than liberally represented in the book markets of all civilized countries. Much of the information thus disseminated is of the type compiled to make “best sellers,” and is thus offered in erotic settings. Other productions, while motivated by the best of intentions, literally reek with unphysiologic statements and misguiding leads, but occasionally a work appears, that represents the type of orientation desirable for consumption by the educated layman. The recent book by Fielding falls within the last mentioned class, as it shows evidence of having been thoughtfully written after a careful digest of a mass of scientific literature that has been produced on this subject.

Starting with the physical aspects of sex, including the hormonic components of emotional responses, the author follows the evolution of