The following case of a man of thirty years of age shows how maladjustments of environment may develop a permanent homosexual perversion. At the age of ten the patient was abused by his tutor for paederastic purposes. Since then he was not able to give it up. Concarnatio with sympathetic men gives him the highest pleasure. His aversion to women is now complete. Before his seduction he had inclinations to little girls. Nowadays the sight of a naked woman disgusts him. He loves to be caressed, fondled and adored by men. He likes to be adored by and feel dependent upon some powerful man. He hires strong men ad inserendum fascini in anum suum. For this reason he is often found in the haunts of the worst gangs of the under-world of the city. He never as yet played the active part, quamquam erectiones et ejaculationes habet vehementes jacens in brachiis amatorum mercenariorum. Krafft-Ebing relates the histories of several female patients belonging to this degree of homosexuality. One of his patients was neurasthenic and always excited. From her earliest youth she was subject to sexual excitement and spontaneously stuprabat manu. She began to menstruate at the age of fourteen. Menstruation caused her great pains and was accompanied by intense sexual excitement. When she was eighteen years old she gave up manu stuprum. She never experienced inclination toward the opposite sex and married only to find a home. On the other hand, she was powerfully attracted by girls and realized that this meant more than mere friendship. The sight of a pretty girl causes her intense excitement. She has at once the desire to embrace and kiss her. She dreams of girls and revels in looking at them. In another case of Krafft-Ebing’s the patient was twenty-two years of age and considered a beauty. Though she was very sensual, yet she refused all proposals of men and only once in her life allowed an admirer to kiss her. Until puberty she was sexually indifferent. When seventeen years of age she happened to see one of her admirers in “actione coeundi,” “more bestiarum,” cum muliere menstruata in horto. The sight of the blood and the bestial lust of the man terrified her to such a degree that she saw henceforth in men only the embodiment of coarseness and vulgarity. When nineteen years of age she made the acquaintance of another invert with whom she indulged in wild orgies until she fell exhausted and unnerved. Cum altera jaceret in se cunnilingum faciens she felt an unspeakable thrill going through her whole body. She herself was only allowed to kiss the other’s “mammae.” These relations with her friend lasted a year.