Is it unreasonable to suppose that the abnormal passion which led David to commit the most heinous sin of his life in his adultery with Bath-sheba and subsequently procuring the death of her husband, was really an hereditary propensity which had come down to him through his ancestors, and which, under more favorable circumstances, was more fully developed in his sons? The trait may have been kept dormant by the active and simple habits of his early years, but asserted itself in full force under the fostering influence of royal idleness and luxury. In accordance with the known laws of heredity, such a tendency would be the legitimate result of such a combination of circumstances. The influence of marital excesses, and especially sexual indulgence during pregnancy, in producing vicious tendencies in offspring, has been fully dwelt upon elsewhere in this work, and will not be reconsidered here, it being only necessary to call attention to the subject. Physiology shows conclusively that thousands of parents whose sons have become libertines and their daughters courtesans, have themselves implanted in their characters the propensity which led to their unchastity. Gluttony.--As a predisposing cause, the influence of dietetic habits should rank next to heredity. It is an observed fact that "all libertines are great eaters or famous gastronomists." The exciting influence upon the genital organs of such articles as pepper, mustard, ginger, spices, truffles, wine, and all alcoholic drinks, is well known. Tea and coffee directly excite the animal passions through their influence upon the nerve centers controlling the sexual organs. When children are raised upon such articles, or upon food with which they are thoroughly mingled, what wonder that they occasionally "turn out bad"? How many mothers, while teaching their children the principles of virtue in the nursery, unwittingly stimulate their passions at the dinner table until vice becomes almost a physical necessity! Nothing tends so powerfully to keep the passions in abeyance as a simple diet, free from condiments, especially when coupled with a generous amount of exercise. The influence of tobacco in leading to unchastity has been referred to in another connection. This is assuredly a not uncommon cause. When a boy places the first cigar or quid of tobacco to his lips, he takes--if he has not previously done so--the first step in the road to infamy; and if he adds wine or beer, he takes a short cut to the degradation of his manhood by the loss of virtue.