The last point may be considered first. Men's desires are socially determined. Even the simplest, most instinctive, wants of human nature are, in their concrete manifestations, the product of social culture in overwhelming degree. Consider sex and hunger. We do not enjoy our food when our neighbors pick their teeth with their forks. This would not trouble a chimpanzee, whose _instinctive_ equipment in the matter of hunger is vastly more like that of a man than is the _actual_ hunger impulse of a highly civilized man like that of a savage. Civilized men will often starve rather than eat human flesh. Even when moral scruples are overcome, actual physical revulsion may prevent it. Men of different times and places wish food of special sorts, served in special ways. They wish to eat in the company of their fellows, but only of those fellows who can know and obey the ritual that is appropriate to the time and place. This is true of humble folk as of those who "dress for dinner." The ritual differs for the two sorts of people. But there is a spirit, a type of conversation, a code of etiquette, which prevails at the mealtime of virtually all men, and too serious digressions therefrom will take away the appetites of all. About the mealtime and the festal board have gathered a great host of traditions, ideals, and social activities, till they have become in verity an institution, and not the least important, by any means, of social institutions. Out of the simple instinct of sex, we have evolved many of the most precious things of our civilization, and between the sex impulse of the animal and the sex impulse of the gentleman who is seeking to marry the one woman in all the world, there is a difference so great that comparison between the two is difficult.