For the same reason homosexual relationships are very prevalent in boarding-schools, academies and in convents for young girls. In the great majority of cases the tender and demonstrative attachments between two boys or between two girls are of a sensual nature, although they seldom arouse the suspicion of educators or parents. The boys, as a rule, practise stuprum mutuum, but not seldom they are also given to “insertio fascini in rectum,” or the real act of paederastia. The stronger boy generally plays the active part, the younger boy is the pathicus; or they often change rôles during the same sitting. Among girls the rule is that the girl of weak sexual instinct is, in these attachments, satisfied with kissing and hugging her female friend, and induces in this way orgasm and even ejaculation. Those girls of a strong sexual impulse are given to stuprum mutuum and cunnilingus, and when the clitoris allows it, resort ad imitationem commixtionis. Next to boarding-schools and convents, prisons and factories are hot-beds for the practice of paederastia, respectively lesbianism. The young men, respectively the young women, form relationships and satisfy their sexual desires as soon as opportunity offers. Their passions are exalted and they experience all the sufferings of jealousy as in normal love. All such attachments are dissolved as soon as opportunity for the exercise of normal sexual activity is offered, as the following case of the author shows: A man thirty years old, healthy, strong, sensual, began se stuprare early in life, when only twelve years old. At the age of fifteen he was seduced by a friend ad stuprum mutuum manu. At this occasion he had his first ejaculation. Since this time he has practised with his school friends not only stuprum mutuum manu but also paedicatio. At the age of nineteen he began to associate with puellae publicae and gave at once up all unnatural practices. _Fear._—Apart from necessity, one of the main causes for perverted homosexual practices among normal boys is the fear of venereal infection. In girls is added to the fear of infection the dread of pregnancy. The majority of such girls eschew men because they fear the shame and the consequences of an accidental pregnancy. An unmarried girl in possession of all her normal sexual desires is, nevertheless, afraid to indulge in normal love affairs as male bachelors do. Hence she looks for a friend of her own sex where no consequences are to be feared. How the fear of infection by the impure female may be the cause of the transfer of his affections to individuals of the same sex shows the following case: