Crawley has explained the taboos on the sexes eating together and on the cooking of food by women for men as due to the superstitious belief that food which has come in contact with or under the influence of the female is capable of transmitting her properties. Some southern Arabs would die rather than accept food from a woman.[12] Among the old Semites it was not the custom for a man to eat with his wife and children. Among the Motu of New Guinea when a man is helega, he may not eat food that his wife has cooked.[46] South Australian boys during initiation are forbidden to eat with the women, lest they "grow ugly or become grey." It was probably some fear of the charm-weaving power of woman which lay at the root of the rules which forbade her to speak her husband's name, the implication being that she might use it in some incantation against him. For instance, a Zulu woman was forbidden to speak her husband's name; if she did so, she would be suspected of witchcraft.[47] Herodotus tells us that no Ionian woman would ever mention the name of her husband, nor may a Hindu woman do so.[48] Frazer says that the custom of the Kaffir woman of South Africa not to speak the name of her own or husband's relations has given rise to an almost entirely different language from that of the men through the substitution of new words for the words thus banned. Once this "women's speech" had arisen, it would of course not be used by the men because of the universal contempt for woman and all that pertained to her. This may have been the origin of the use of different dialects in some tribes, such as the Japanese, the Arawaks, some Brazilian tribes, and others.[49] Although the division of labour between the sexes had a natural biological basis, and indeed had its beginning in the animal world long before man as such came into existence, the idea of the uncleanness of woman was carried over to her work, which became beneath the dignity of man. As a result, there grew up a series of taboos which absolutely fixed the sphere of woman's labour, and prohibited her from encroaching on the pursuits of man lest they be degraded by her use, quite as much as they barred man from her specific activities. In Nicaragua, for example, it is a rule that the marketing shall be done by women. In Samoa, where the manufacture of cloth is allotted to the women, it is taboo for a man to engage in any part of the process.[30] Among the Andamanese the performance of most of the domestic duties falls to the lot of the women and children. Only in cases of stern necessity will the husband procure wood or water.[50] An Eskimo even thinks it an indignity to row in an _umiak_, the large boat used by women.