The case of coprolagnia communicated to me is that of a married man, normal in all other respects, intellectually brilliant and filling successfully a very responsible position. When a child the women of his household were always indifferent as to his presence in their bedrooms, and would satisfy all natural calls without reserve before him. He would dream of this with erections. His sexual interests became slowly centered in the act of defecation, and this fetich throughout life never appealed to him so powerfully as when associated with the particular type of household furniture which was used for this purpose in his own house. The act of defecation in the opposite sex or anything pertaining to or suggesting the same caused uncontrollable sexual excitement; the nates also exerted a great attraction. The alvine excreta exerted this influence even in the absence of the woman; it was, however, necessary that she should be a sexually desirable person. The perversion in this case was not complete; that is to say, that the excitement produced by the act of defecation or the excretion itself was not actually preferred to coitus; the sexual idea was normal coitus in the normal manner, but preceded by the visual and olfactory enjoyment of the exciting fetich. When coitus was not possible the enjoyment of the fetich was accompanied by masturbation (as in the analogous case of urolagnia in a woman summarized on p. 62.) On one occasion he was discovered by a friend in a bedroom belonging to a woman, engaged in the act of masturbation over a vessel containing the desired fetich. In an agony of shame he begged the mercy of silence concerning this episode, at the same time revealing his life-history. He has constantly been haunted by the dread of detection, as well as by remorse and the consciousness of degradation, also by the fear that his unconquerable obsession may lead him to the asylum.