_I. Degree: Simple Reversal of Sexual Feeling._—This degree is attained when persons of the same sex have an aphrodisiac effect, and the individual has a sexual feeling for them. Character and feeling, however, still correspond with the sex of the individual presenting the reversal of sexual feeling. He feels himself in the active _rôle_; he recognizes his impulse toward his own sex as an aberration, and finally seeks aid. With episodical improvement of the neurosis, at first even normal sexual feelings may re-appear and assert themselves. The following case seems well suited to exemplify this stage of the psycho-sexual degeneration:— Case 94. _Acquired Contrary Sexual Instinct._—“I am an official, and, as far as I know, come of an untainted family. My father died of an acute disease; my mother is living and is _quite nervous_. _A sister has been very intensely religious for some years._ “I myself am tall, and, in speech, gait, and manner, give a perfectly masculine impression. Measles is the only disease I have had; but since my thirteenth year I have suffered with so-called nervous headache. My sexual life began in my thirteenth year, when I became acquainted with a boy somewhat older than myself, with whom I took pleasure in mutual fondling of the genitals. I had the first ejaculation in my fourteenth year. Seduced to onanism by two older school-mates, I practiced it partly with others and partly alone; in the latter case, however, always with the thought of persons of the female sex. My libido sexualis was very great, as it is to-day. Later, I tried to win a pretty, stout servant-girl who had very large mammæ; id solum assecutus sum, ut me praesente superiorem corporis sui partem enudaret mihique concederet os mammasque osculari, dum ipsa penem meum valde erectum in manum suam recepit eumque trivit. “Notwithstanding my urgent demand for coitus, she would not allow it; but she finally permitted me to touch her genitals. “After going to the University, I visited a brothel and succeeded without especial effort. “There an event occurred which brought a change in me. One evening I accompanied a friend home, and in a mild state of intoxication I grasped him ad genitalia. He made but slight opposition. I then went up to his room with him, and we practiced mutual masturbation. From that time we indulged in it quite frequently; in fact, it came to immissio penis in os, with resultant ejaculations. But it is strange that I was not at all in love with this person, but passionately in love with another friend, near whom I never felt the slightest sexual excitement, and whom I never connected with sexual matters, even in thought. My visits to brothels, where I was gladly received, became more infrequent; in my friend I found a substitute, and did not desire sexual intercourse with women.