In scientific literature, the conditions that constitute masochism have not received attention until recently. All there is to mention is that Tarnowsky (“die Krankhaften Erscheinungen des Geschlechtssinns,” Berlin, 1886) relates that he has known happily married, intellectual men, who from time to time felt an irresistible impulse to subject themselves to the coarsest, cynical treatment,—to scoldings or blows from passive or active pederasts, or prostitutes. It is worthy of remark that, in Tarnowsky’s observation, in certain cases blows, even when they draw blood, do not bring the result desired (virility, or at least ejaculation during flagellation) by those given to passive flagellation. “The individual must then be undressed by force, his hands tied, fastened to a bench, etc., during which he fancies that he makes opposition, scolds, and pretends to resist. Only under such circumstances do the blows induce excitement that leads to ejaculation.” O. Zimmermann’s work, “Die Wonne des Leids,” Leipzig, 1885, also contributes much to this subject,[68] taken from the history and literature. Of late the subject has been given much attention. A. Moll, in his work, “Die Conträre Sexualempfindung,” pp. 133 and 141 _et seq._, Berlin, 1891, gives a number of cases of complete masochism in individuals of contrary sexuality, and among them the case of a man suffering with contrary sexual instinct, who sent written instructions, containing twenty paragraphs, to a man engaged for his purpose, who was to treat and abuse him like a slave. In June, 1891, Mr. Dimitri von Stefanowsky, Deputy Government Attorney in Jaroslaw, Russia, informed me that, about three years before, he had given his attention to the perversion of the vita sexualis, designated “masochism” by me, and called “passivism” by him; that a year and a half previously he had prepared a paper on the subject for Professor von Kowalewsky for the Russian _Archives of Psychiatry_; and that in November, 1888, he had read a paper on this subject, considered in its legal and psychological aspects, before the Legal Society of Moscow (printed in the _Juridischen Boten_, the organ of the society, in numbers 6 to 8). In later fiction the psycho-sexual perversion which forms the subject of this study has been treated by Sacher-Masoch, whose writings, already frequently alluded to, afford typical pictures of the perverse mental life of men of this kind. Many affected with this perversion refer directly to the writings of Sacher-Masoch, as is seen from the foregoing cases, as typical descriptions of their own psychical condition.