We may remark about the sexual features of social life in Australia in general, that far from bearing any character of indiscriminate promiscuity on the whole, they are, on the contrary, subject to strict regulations, restrictions, and rules. Every form of licence must be subject to customary rules. The principle of class exogamy is maintained in the majority of cases: so the _Pirrauru_ relation is subject to class rule, as is also wife-lending, wife-exchange, and the rare cases of licence among unmarried girls and widows. But the licence occurring during religious, totemic, and other ceremonies is, as we have seen above, not subject to the class rule. Even the most prohibited and tabooed degree--that between a man and his mother-in-law--is violated by custom. This fact is also noteworthy for the criticism of theories which see both in class exogamy and in sexual licence survivals of former group marriage. At some ceremonies of a magical and religious character sexual licence occurs, in agreement with the principle that survivals are always connected with religious facts. But if class exogamy is also a survival of group marriage, why should _this_ fall in abeyance on such occasions? For if these two principles were so deeply connected, why should one of them (class exogamy) be entirely neglected on the very occasion when the other (ceremonial licence) is most conspicuous? Is that not again one of the serious difficulties in the way of the hypothesis of a previous group marriage, a difficulty which at least must be accounted for, and which is always completely ignored by the authors concerned? There is justification for saying that the notion of adultery and the reprobation thereof is well known to the aborigines, and that they punish and condemn unlawful unions of all kinds. As W. E. Roth says, "morality in a broad sense" is well known to the Australian aborigines. It could be even said that sexual morality does exist, only according to a special code, which is obviously different from ours, if we understand by "morality" the fact that there exists a series of determined norms and that these norms are followed.