Our discussions thus far have been restricted to those aspects of totemism which are directly related to tribal organization. But however important these phases may be, particularly in so far as they affect marriage regulations, they are, after all, but an external indication of the all-pervading influence of totemism upon life as a whole. Moreover, tribal totemism leaves many things unexplained, especially the origin of totemic belief. At any rate, the fact that totem groups were originally cult associations unmistakably points to inner motives of which the influence of totemism upon tribal organization and upon exogamy is but the outer expression. To answer the question concerning the nature of these motives, however, we must first call to mind the various sorts of totemic ideas. An analysis of these ideas may proceed in either of _two_ directions. It may concern itself either with the _social unit_ that regards itself as in relation to the totem or with the nature of the _object_ that constitutes the totem. So far as the social unit is concerned, it may be a particular group of individuals--whether constituting a cult association independent of the real tribal organization, as in Australia, or, as in America, representing one of the tribal divisions themselves--that takes the name of a particular animal or, less frequently, of a plant for its totemic designation. The individual, however, may also possess a personal totem. Furthermore, the totemic idea may be associated with the birth of an individual, conception being regarded as an act in which the totem ancestor passes over into the germ as a magic being. This particular form of totemic belief is generally known as conception totemism. It supposes either that the totem ancestor co-operates with the father in the begetting of the child or that the father has no connection with procreation, the child being the direct offspring of the mother and the totem ancestor. There is, finally, also a fourth, though a relatively uncommon, form of totemism, generally called 'sex totemism.' Sex totemism also is social in nature, though in this case it is not different cult or tribal associations that possess separate totems, but the sexes, the men and women of a tribe or clan. The men have a totem, as have also the women, or there may be several totems for each sex.