Jules P., aged 22, of good heredity on father's side, but bad on that of mother, who is highly hysterical, while his grandmother was very impulsive and sometimes pursued other women with a knife. He has one brother and one sister, who are somewhat morbid and original. He is himself healthy, intelligent, good looking, and agreeable, though with slightly morbid peculiarities. At the age of 4 or 5 he suddenly opened a door and saw his sister, then a girl of 14 or 15, kneeling, with her clothes raised and her head on her governess's lap, at the moment of being whipped for some offense. This trivial incident left a profound impression on his mind, and he recalls every detail of it, especially the sight of his sister's buttocks,--round, white, and enormous as they seemed to his childish eyes,--and that momentary vision gave a permanent direction to the whole of his sexual life. Always after that he desired to touch and pat his sister's gluteal regions. He shared her bed, and, though only a child, acquired great skill in attaining his ends without attracting her attention, lifting her night-gown when she slept and gently caressing the buttocks, also contriving to turn her over on to her stomach and then make a pillow of her hips. This went on until the age of 7, when he began to play with two little girls of the neighborhood, the eldest of whom was 10; he liked to take the part of the father and whip them. The older girl was big for her age, and he would separate her drawers and smack her with much voluptuous emotion; so that he frequently sought opportunities to repeat the experience, to which the girl willingly lent herself, and they were constantly together in dark corners, the girl herself opening her drawers to enable him to caress her thighs and buttocks with his hand until he became conscious of an erection. Sometimes he would gently use a whip. On one occasion she asked him if he would not now like to see her in front, but he declined. One day, when 8 or 9 years old, being with a boy companion, he came upon a picture of a monk being flagellated, and thereupon persuaded his companion to let himself be whipped; the boy enjoyed the experience, which was therefore often repeated. Jules P. himself, however, never took the slightest pleasure in playing the passive part. These practices were continued even after the friend became a conscript, when, however, they became very rare. Only once or twice has he ever done anything of this kind to girls who were strangers to him. Nor has he ever masturbated or had any desire for sexual intercourse. He contents himself with the pleasure of being occasionally able to witness scenes of whipping in public places--parks and gardens--or of catching glimpses of the thighs and buttocks of young girls or, if possible, women.