"Perhaps nothing fosters vice more than ignorance. Prostitutes come almost entirely from the more ignorant classes, though there are, of course, many exceptions. Among the lowest classes, vice is seen in its grossest forms and is carried to the greatest lengths. Intellectual culture is antagonistic to sensuality. As a general rule, in proportion as the intellect is developed, the animal passions are brought into subjection. It is true that very intellectual men have been great libertines, and that the licentious Borgias and Medicis of Italy encouraged art and literature ; but those are only apparent exceptions, for who knows to what greater depths of vice these individuals might have sunk had it not been for the restraining influence of mental culture ? Says Deslandes, “In proportion as the intellect becomes enfeebled, the generative sensibility is augmented.” The animal passions seem to survive when all higher intelligence is lost. We once saw an illustration of this fact in an idiot who has brought before a medical class in a clinic at Bellevue Hospital, New York. The patient had been an idiot from birth, and presented the most revolting appearance, seemingly possessing scarcely the intelligence of the average dog; but his animal propensities were so great as to be almost uncontrollable. Indeed, he showed evidences of having been a gross debauchee, having contracted venereal disease of the worst form. The general prevalence of extravagant sexual excitement among the insane is a well-known fact."