Some authors who relax the censorship voluntarily and appear to be without a sense of shame, give us some of the immoral literature which the world publicly abhors, but which individuals often delight in reading in private. I do not refer to the really great literature which has been stamped "immoral" by prudish people, because its ideas are too far advanced for them to appreciate, and are different from the conventional morals of society. I do not refer to the hundreds of great works which give us true accounts of the natural man, books whose irresistibility cannot be evaded except by hypocrites. I do not include novels and plays wherein the authors have realised that we are exerting too great a sacrifice upon our emotions and that many souls are starved by lack of normal gratification on account of the harsh exactions of conventional society. But there is a real immoral (or rather indecent) literature where the author allows his savage instincts to come to the surface and trespass on those aspects of his personality which civilisation should have tamed. He may suffer from the vice of exhibitionism and think he is frank, when he is merely showing he has no sense of shame; and he may cater to a market merely for money, in which case he acts like a mercenary harlot. He may try to gratify himself by sexual abandon in art because he has never had the craving for love satisfied in life. He gives vent to instincts that are still ruling him because of his own atavistic or neurotic state. Psychoanalytic literature puts in a new light immoral literature, which hitherto has been dealt with from a moral, and not a psychological, point of view. This literature should be explained and its sources traced; these will be found in the infantile love life of the authors. Such writings should not be condemned offhand just because they stir our moral indignation. They must be interpreted so that we may learn the nature of their authors. I have also made a study of so repulsive a feature in the lives of our earliest ancestors as cannibalism. It is one of the most primitive emotions. The discoveries of archæologists show that cannibalism prevailed in Europe before the dawn of history; Greek plays show its early existence in Greece; and we know that it still prevails among savage tribes to-day.