We have seen that individuals appear much more lascivious, as they become more stupid and insensible; venereal sensuality often developes itself under very different circumstances. It may be only an episode, and sometimes it is an effect of the general susceptibility. A person is lascivious, because he is alive to vivid impressions; because the genital organs, like the rest of the economy, are easily excited, and their excitement is vividly felt. This disposition occurs often in hypochondriac and hysterical people; that is, in individuals who are so susceptible as to be habitually sick. They are easily excited, and have nocturnal pollutions from the slightest cause. The genital organs, also like the others, may become affected by an irritation which is seated at a greater or less distance from them; for instance, in the stomach, lungs, skin, &c. Those persons who are affected with cutaneous diseases, which cause itching, are generally extremely lascivious. Symptoms similar to priapism and satyriasis, appear in numerous diseases. Nervous or flatulent colics have often been known to produce a similar effect. A woman observed in 1833, at Hotel Dieu, in the ward of Bouillaud, and whose case is reported by Donne, (Revue Med., June, 1833,) presented a phenomena, which, notwithstanding its strangeness, is explained by what we have said. She was thirty years old, of a strong constitution, and hysterical. After an attack of acute rheumatism affecting the wrist, her hand became exquisitely sensible, and the slightest friction upon it, procured for the patient all the sensations arising from coition. This aberration of the sensibility disappeared with the last traces of the rheumatic inflammation, and the part regained its natural state. A highly respectable man, Dr. Mirambeau, communicated to us the case of a child who procured similar sensations by pulling his umbilicus. His health suffered so much in consequence of this singular habit, that coercive measures were employed to check it. We must remark, however, that notwithstanding the sensations mentioned, this patient presented no erection nor any other phenomena in the genital organs, similar to those of the act of venery. _Of the things which may produce venereal excitement, and of the modes of preservation which are connected with them._ These things are all those which are capable of increasing the sensibility in general and particularly that of the organs of venery: the means are, the influences which may be used to act in a contrary direction. The venereal desire may develope itself at all seasons. The most favorable to its appearance, however, is spring. This fact was well known to the ancients: but it did not rest on a scientific foundation till recently. The confirmation of this fact is owing to the statistical labors of Villermé in France and of Quetelet and Smits in Belgium.