the testicles should be remembered, which has sometimes been observed to follow focal lesions of the brain (cerebellum).
A diminution of the vita sexualis, from degeneration of the tracts of the cord and genito-spinal centre, occurs in diseases of the spinal cord and brain. A central interference with the sexual instinct may be organically induced by cortical disease (dementia paralytica in its advanced stages); functionally, by hysteria (central anæsthesia?) and emotional insanity (melancholia, hypochondria).
C. Hyperæsthesia (Abnormally Increased Sexual Desire).
Pathology has no easy task, in the single case, when it has to decide whether the impulse to sexual satisfaction has reached a pathological degree. Emminghaus (“Psychopathologie,” p. 225) declares that the immediate re-awakening of desire after satisfaction, with its occupation of the entire attention, and no less the excitation of libido by the sight of persons and things which in themselves should have but an indifferent sexual effect, are decidedly abnormal. In general, sexual instinct and its corresponding needs are in proportion to physical strength and age. Sexual desire rapidly increases after puberty, until it reaches a marked degree; is strongest from the twentieth to the fortieth year, and then slowly decreases. Married life seems to preserve and control the instinct. Sexual intercourse with many persons increases the desire.
Since woman has less sexual need than man, a predominating sexual desire in her arouses a suspicion of its pathological significance; and the more, when this finds expression in desire for adornment, coquetry, or male society, which, passing beyond the limits set by good breeding and manners, becomes quite noticeable.
The constitution, in both sexes, is of the greatest significance. An abnormally strong sexual instinct is frequently accompanied by a neuropathic constitution; and such individuals pass a great part of their lives heavily burdened with the weight of this constitutional anomaly of their sexual life. The power of the sexual impulse in such cases may at times rise to the
