Ball distinguishes two categories of erotomaniacs. Some are discreet lovers. They never accost the object of their love and do not even feel the need to approach the divine hearth, whence the spark started that inflamed their hearts. It is a pure immaterial fire that feeds on itself. The other category, the indiscreet lovers, feel the necessity to impart the knowledge of their passion to the object that gave it rise. _Satyriasis and nymphomania._—Contrary to erotomania, the sexual impulse in satyriasis and in nymphomania is directed upon the physical side of love. In these cases the impulse of detumescence is greatly increased. The desires are directed upon the physical, pleasurable titillations of the sexual organs. The dividing line between the normal and pathological increase of libido is not readily found. The libido sexualis normally varies in different individuals. Married life bridles, as a rule, sexual desire, while intercourse with different persons increases it. Total sexual abstinence may cause in certain individuals, with a neurotic taint, increased sexual desire, continuous excitement, diseased, unconquerable impulse for sexual congress, and the preoccupation of the entire attention upon the sensual act. The immediate reawakening of desire after normal satisfaction and the excitation of libido by the sight of persons and things which in themselves should have but indifferent or no sexual effects, are decidedly abnormal. If the increase of the impulse is only moderate, so that increased frequency of conjugal embrace is able to appease somewhat the increased desire, the anomaly generally finds expression in a desire for female respectively male society, in the reading of erotic or obscene literature, in dancing, flirting, etc. But if the increase of the sexual desire has reached the degree of true satyriasis in men or nymphomania in women, the anomaly is characterized by an irresistible exaltation and an insatiable appetite for sexual gratification. At the mere sight of a woman satyriasis gets into such a state of excitement, as to experience real orgasm. Satyriasis is not seldom confounded with priapism. But the latter is in no respect a psycho-sexual anomaly at all. It is a nervous trouble of one of the genital organs and has nothing in common with satyriasis. On the contrary, in priapism the potencies of voluptas as well as that of experiencing libido are generally decreased, as Tarnowsky’s case shows (L’instinct sexuel, p. 150).