+387+. It is obvious that not all customs that include the function of generation are of the nature of religious observances. The promiscuity that obtains in many savage communities before marriage is a naïve unreflective animal procedure. Exchange of wives (as in Central Australia) and the offering of a wife to a guest are matters of social etiquette. Festivals in which sexual license is the rule are generally merely the expression of natural impulses. Holidays, being times of amusement, are occasions used by the people for the satisfaction of all appetites: there is eating and drinking, buffoonery, disregard of current conventions, unbounded liberty to do whatever exuberant animalism prompts. Such festivities abound among existing savages,[707] were not uncommon in ancient civilized times,[708] and have survived in diminished form to the present day.[709] In the course of time they often become attached to the worship of gods, are organized, explained by myths, and sanctified. In such cases of coalescence we must distinguish between the true worship offered to a divine being, and the observances, generally originating in desire for animal amusement and enjoyment, that have been attached to them. +388+. _Cult of generative organs._ Men's attention must have been directed very early to those organs that were believed to be connected with the genesis of human life. At what stage this belief arose it is hardly possible to say; there are peoples among whom it seems not to exist;[710] but it is found over a great part of the world, and was doubtless an outcome of popular observation.[711] As it was intimately connected with life it passed naturally into the domain of religion, and in process of time became a more or less prominent part of religious observances; the organs in question, both male and female, became objects of religious devotion. +389+. Here again it must be noted that not all usages connected with the organs of generation were religious of origin. It is pointed out above[712] that the origin of circumcision and excision is to be sought in another direction. Ithyphallic images are sometimes merely attempts at realism in art; a nude figure (as in modern art) must be represented in its full proportions. Such seems to be the nature of certain images among the Western Bantu,[713] and this may have been the case with the images of the Egyptian Khem and Osiris and similar deities. In general this sort of representation in savage and ancient civilized communities is often either simple realism or indecency. Folk-stories abound in details that sound indecent to modern ears, but were for the authors often merely copies of current usages.