for "immorality" —that is disregard of tribal usage — will force her to choose a new mate.
Another very important reason for marriage, from the man's point of view, is economic advantage. Marriage brings with it a considerable yearly tribute in staple food, given to the husband by the wife's family. This obligation is perhaps the most important factor in the whole social mechanism of Trobriand society. On it, through the institution of rank and through his privilege of polygamy, rests the authority of the chief, and his power to finance all ceremonial enterprises and festivities. Thus a man, especially if he be of rank and importance, is compelled to marry, for, apart from the fact that his economic position is strengthened by the income received from his wife's family, he obtains his full social status only by entering the group of tovavaygile.
There is, further, the natural inclination of a man past his first youth to have a house and a household of his own. The services rendered by a woman to her husband are naturally attractive to a man of such an age; his craving for domesticity has developed, while his desire for change and amorous adventure has died down. Moreover, a household means children, and the Trobriander has a natural longing for these. Although not considered of his own body nor as continuing his line, they yet give him that tender companionship for which, when he reaches twenty-five or thirty, he begins to crave. He has become used, it should be remembered, to playing with his sister's children and with those of other relatives or neighbours.
