This must also to a great extent deprive jealousy of its violent character. On the other hand, social opinion, which in our society works through ideas of honour and ridicule, strengthening the feelings of jealousy and giving to them a certain outer prestige, even in cases when they may not be actually felt--in the Australian Aboriginal Society uses these factors with a directly contrary effect. As a matter of fact, in many cases, public opinion compels a man to give his wife away; it is considered an incident of hospitality, a virtue. In other cases it is an honourable duty, as _e. g._ in cases of wife offering during a ceremony in order to express gratitude. We read that in cases where a man begrudges his wife to a _Pirrauru_ he is regarded as churlish. Obviously, these social factors act here to modify and moderate the feeling of sexual jealousy. We find no instance or statement which would point to a contrary influence of these factors in the Australian aboriginal society.[348] But, as pointed out above, the idea of individual sexual over-right and control over his wife is strongly present in the aboriginal mind. This right is undoubtedly realized as a privilege, and the natural tendency to keep his privileges for himself, or dispose of them according to his wish or interest, must create a strong opposition to any encroachment. In other words, the sexual act has its intrinsic value, and it is considered as an unquestionable advantage. And the right to this advantage constitutes a kind of private property. The feeling of jealousy exists here in its economic sense: the proprietor of a certain object begrudges the use of it to any one whom he does not invite to it, or who is not otherwise entitled to the privilege. And this seems to me one of the strongest probable sources of jealousy, besides the natural physiological impulse of aversion, mentioned above. I think it is corroborated by the facts enumerated, which show that the husband vigilantly watches over and keeps his over-right.