"Having command of abundant means, I now, at the age of fifteen, became enabled to gratify my sexual desires without restraint with dependents of the other sex; nor did any untoward physical consequences arise to impose limitations. After a time, ordinary sexual intercourse ceased to furnish adequate gratification; and I began to excite myself sexually by contact with special parts of the body, most often the breasts. But the woman must not, as had formerly been my desire, strip herself completely nude; for I found the most powerful sexual stimulus was now exerted by her white drawers. The display, intentional or unintentional, of this article of feminine attire sufficed to arouse in me sexual feelings. For this reason I now came to frequent the skating rink, in order to obtain a sexual stimulus from the glimpse of a woman's drawers when putting on her skates. But even when a girl was physically beautiful and elegantly dressed, if her drawers were not white but coloured, she produced in me no sexual appetite whatever. "As a result of long-continued excesses, attempts at ordinary intercourse no longer evoked an adequate sexual stimulus, so that I now began the practice of cunnilinctus. It was when the woman herself became excited through the cunnilinctus, that I experienced the highest sexual gratification. In the intervals, when I had no opportunity for sexual intercourse, I would endeavour to secure sexual gratification by exposing my genital organs in the presence of females, or when passing them in the street--especially female children. I also sought every possible opportunity of watching female dependents engaged in the act of urination. This gave me especially great gratification if, when they were urinating, I could see their white underlinen. I also procured pornographic literature, and masturbated frequently while reading it." The next period in this patient's history now begins. But I shall not recount his case further, since the subsequent episodes have no bearing on the questions with which we are especially concerned. It will suffice to remark that Z. now exhibits numerous neuropathic and psychopathic characteristics. But the various psychopathic symptoms, some of which are very severe, lie altogether outside our chosen field of study. Paradoxical sexual impulse is observed also in the lower animals. Weston reports the case of a colt which when only six weeks old attempted to serve its mother; when three months old this animal became so troublesome, owing to its attempts to cover other foals and even calves, that castration was necessary.[56] The same author describes a case of masturbation in a foal only two months old; the animal masturbated by arching the back to an extreme degree, and pushing the hind feet forward along the surface of the belly on either side of the penis.