alone, it is possible, somewhat attractive to men[192]. A difference in size and stature is a very marked secondary sexual character. In the considerable body of data concerning the stature of married couples reproduced by Pearson from Galton's tables, although the tall on the average tend to marry the tall, and the short the short, it is yet noteworthy that, while the men of 5 ft. 4 ins. have more wives at 5 ft. 2 ins. than at any other height, men of 6 ft. show, in an exactly similar manner, more wives at 5 ft. 2 ins. than at any other height, although for many intermediate heights the most numerous groups of wives are taller[193]. In matters of carriage, habit, and especially clothing the love of sexual disparity is instinctive, everywhere well marked, and often carried to very great lengths. To some extent such differences are due to the opposing demands of more fundamental differences in custom and occupation. But this cause by no means adequately accounts for them, since it may sometimes happen that what in one land is the practice of the men is in another the practice of the women, and yet the practices of the two sexes are still opposed[194]. Men instinctively desire to avoid doing things in women's ways, and women instinctively avoid doing things in men's ways, yet both sexes admire in the other sex those things which in themselves they avoid. In the matter of clothing this charm of disparity reaches its highest point, and it has constantly happened that men have even called in the aid of religion to enforce a distinction which seemed to them so urgent[195]. One of the greatest of sex allurements would be lost and the extreme importance of clothes would disappear at once if the two sexes were to dress alike; such identity of dress has, however, never come about among any people. FOOTNOTES: [171] L. da Vinci, _Frammenti_, selected by Solmi, pp. 177-180. [172] Westermarck, who accepts the "charm of disparity," gives references, _History of Human Marriage_, p. 354. [173] _Descent of Man_. Part II, Chapter XVIII. [174] Bloch (_Beiträge zur Ætiologie der Psychopathia Sexualis_, Teil II, pp. 260 et seq.) refers to the tendency to admixture of races and to the sexual attraction occasionally exerted by the negress and sometimes the negro on white persons as evidence in favor of such charm of disparity. In part, however, we are here concerned with vague statements concerning imperfectly known facts, in part with merely individual variations, and with that love of the exotic under the stimulation of civilized conditions to which reference has already been made (p. 184).