But many primitives are unaware of the father's role in the procreation of children, who are thought to be the reincarnation of ancestral larvae floating around certain trees, certain rocks, in certain sacred places, and descending into the woman's body; in some cases, they believe she must not be a virgin if this infiltration is to take place; but other peoples believe that it also takes place through the nostrils or mouth; at any rate, defloration is secondary here, and for mystical reasons the prerogative is rarely the husband's.