These constitutions thus may be either congenital or acquired. Individuals apparently normal during childhood and adolescence may be transformed. Injuries to the reproductive glands, sometimes the slightest bruises, may lead to atrophy, and a change of personality follows in less than six weeks. Mumps may achieve the same results because of the inflammation of the gonads that may accompany or follow it. Whole family and races may show some of the signs of the eunuchoid constitution for generations. According to Darwin (Descent of Man) "the development of the beard and the hairiness of the body differ remarkably in the men of distinct races, and even in different tribes, and families of the same race. On the European-Asiatic continent, beards prevail, until we pass beyond India, although with the natives of Ceylon they are often absent.... Eastward of India beards disappear, as with the Siamese, Kalmuks, Malays, Chinese, and Japanese. Throughout the great American continent the men may be said to be beardless: but in almost all tribes a few short hairs are apt to appear on the face, especially in old age...." Hair being an adrenal cortex trait, it is to be inferred that hairless families and races are more eunuchoid, and possess less of the adrenal cortex secretion than the more hairy. Whatever the exceptions--and there have been eunuch generals in history--Marces, Chancellor of Justinian, who beat the Goths at Nocera, and Ali the Gallant who commanded the Turkish Army after the invasion of Hungary in 1856--the eunuchoid generally runs to type in his mentality and his sexuality. He is an introvert, his personality is shut in, he isolates himself from the world. The lower eunuchoids exhibit a curiously child-like personality. Naïvely confiding, communicating to all comers all their joys and sorrows, they ask diffidently for confirmation of their statements, and they pass quickly from tears to laughter. About sexual matters they are extremely timid. A moral innocence pervades their speech and conduct. Usually they have no true conception of crimes of jealousy or passion. The occupations they go in for are those without responsibility away from crowds or observation, such as ship cooks, stewards, and so on. They marry to find a home, without the object of establishing sexual relations. When they are asked whether they think their wives will be pleased to look at the matter in the same light, and be contented to live with a man upon such conditions, they are puzzled or perplexed, as if they had never thought seriously about the matter before. Their simplicity has even extended to proposing to their wives to seek gratification from some other man. Naturally, such an arrangement often proves unsatisfactory, and desertion follows.