The Koyúkuns believe that a youth who marries before he has killed a deer will have no children.[79] The aborigines of Pennsylvania considered it a shame for a boy to think of a wife before having given some proof of his manhood.[80] Among the wild Indians of British Guiana, says Mr. Im Thurn, before a man is allowed to choose a wife he must prove that he can do a man’s work and is able to support himself and his family.[81] Among the Dyaks of Borneo,[82] the Nagas of Upper Assam,[83] and the Alfura of Ceram,[84] no one can marry unless he has in his possession a certain number of heads. The Karmanians, according to Strabo, were considered marriageable only after having killed an enemy.[85] The desire of a Galla warrior is to deprive the enemy of his genitals, the possession of such a trophy being a necessary preliminary to marriage.[86] Among the Bechuana and Kafir tribes south of the Zambesi, the youth is not allowed to take a wife until he has killed a rhinoceros.[87] In the Marianne Group, the suitor had to give proof of his bodily strength and skill.[88] And among the Arabs of Upper Egypt, the man must undergo an ordeal of whipping by the relations of his bride in order to test his courage. If he wishes to be considered worth having, he must receive the chastisement, which is sometimes exceedingly severe, with an expression of enjoyment.[89] The idea that a man is bound to maintain his family is, indeed, so closely connected with that of marriage and fatherhood, that sometimes even repudiated wives with their children are, at least to a certain extent, supported by their former husbands. This is the case among the Chukchi of North-Western Asia,[90] the Basutos in Southern Africa,[91] and the Munda Kols in Chota Nagpore.[92] Further, a wife frequently enjoys her husband’s protection even after sexual relations have been broken off. And upon his death, the obligation of maintaining her and her children devolves on his heirs, the wide-spread custom of a man marrying the widow of his deceased brother being, as we shall see in a subsequent chapter, not only a privilege belonging to the man, but, among several peoples, even a duty. We may thus take for granted that in the human race, at least at its present stage, the father has to perform the same function as in other animal species, where the connections between the sexes last longer than the sexual desire. * * * * *