In discussing sexual questions which are very largely matters of social hygiene we shall thus still be preserving the psychological point of view. Such a point of view in relation to these matters is not only legitimate but necessary. Discussions of social hygiene that are purely medical or purely juridical or purely moral or purely theological not only lead to conclusions that are often entirely opposed to each other but they obviously fail to possess complete applicability to the complex human personality. The main task before us must be to ascertain what best expresses, and what best satisfies, the totality of the impulses and ideas of civilized men and women. So that while we must constantly bear in mind medical, legal, and moral demands--which all correspond in some respects to some individual or social need--the main thing is to satisfy the demands of the whole human person. It is necessary to emphasize this point of view because it would seem that no error is more common among writers on the hygienic and moral problems of sex than the neglect of the psychological standpoint. They may take, for instance, the side of sexual restraint, or the side of sexual unrestraint, but they fail to realize that so narrow a basis is inadequate for the needs of complex human beings. From the wider psychological standpoint we recognize that we have to conciliate opposing impulses that are both alike founded on the human psychic organism. In the preceding volumes of these _Studies_ I have sought to refrain from the expression of any personal opinion and to maintain, so far as possible, a strictly objective attitude. In this endeavor, I trust, I have been successful if I may judge from the fact that I have received the sympathy and approval of all kinds of people, not less of the rationalistic free-thinker than of the orthodox believer, of those who accept, as well as of those who reject, our most current standards of morality. This is as it should be, for whatever our criteria of the worth of feelings and of conduct, it must always be of use to us to know what exactly are the feelings of people and how those feelings tend to affect their conduct. In the present volume, however, where social traditions necessarily come in for consideration and where we have to discuss the growth of those traditions in the past and their probable evolution in the future, I am not sanguine that the objectivity of my attitude will be equally clear to the reader. I have here to set down not only what people actually feel and do but what I think they are tending to feel and do. That is a matter of estimation only, however widely and however cautiously it is approached; it cannot be a matter of absolute demonstration. I trust that those who have followed me in the past will bear with me still, even if it is impossible for them always to accept the conclusions I have myself reached. HAVELOCK ELLIS. Carbis Bay, Cornwall, England. CONTENTS. CHAPTER I.