It was not, however, so much on these more spiritual sides, but on the side of hygiene, that the nineteenth century furnished its chief practical contribution to the new attitude towards nakedness.
Lord Monboddo, the Scotch judge, who was a pioneer in regard to many modern ideas, had already in the eighteenth century realized the hygienic value of "air-baths," and he invented that now familiar name. "Lord Monboddo," says Boswell, in 1777 (Life of Johnson, edited by Hill, vol. iii, p. 168) "told me that he awaked every morning at four, and then for his health got up and walked in his room naked, with the window open, which he called taking an air-bath." It is said also, I know not on what authority, that he made his beautiful daughters take an air-bath naked on the terrace every morning. Another distinguished man of the same century, Benjamin Franklin, used sometimes to work naked in his study on hygienic grounds, and, it is recorded, once affrighted a servant-girl by opening the door in an absent-minded moment, thus unattired.
Rikli seems to have been the apostle of air-baths and sun-baths regarded as a systematic method. He established light-and air-baths over half a century ago at Trieste and elsewhere in Austria. His motto was: "Light, Truth, and Freedom are the motive forces towards the highest development of physical and moral health." Man is not a fish, he declared; light and air are the first conditions of a highly organized life. Solaria for the treatment of a number of different disordered conditions are now commonly established, and most systems of natural therapeutics attach prime importance to light and air, while in medicine generally it is beginning to be recognized that such influences can by no means be neglected. Dr. Fernand Sandoz, in his Introduction à la Thérapeutique Naturiste par les agents Physiques et Dietétiques (1907) sets forth such methods comprehensively. In Germany sun-baths have become widely common; thus Lenkei (in a paper summarized in British Medical Journal, Oct. 31, 1908) prescribes them with much benefit in tuberculosis, rheumatic conditions, obesity, anæmia, neurasthenia, etc. He considers that their peculiar value lies in the action of light. Professor J. N. Hyde, of Chicago, even believes ("Light-Hunger in the Production of Psoriasis," British Medical Journal, Oct. 6, 1906), that psoriasis is caused by deficiency of sunlight, and is best cured by the application of light. This belief, which has not, however, been generally accepted in its unqualified form, he ingeniously supports by the fact that psoriasis tends to appear on the most exposed parts of the body, which may be held to naturally receive and require the maximum of light, and by the absence of the disease in hot countries and among negroes.
The hygienic value of nakedness is indicated by the robust health of the savages throughout the world who go naked. The vigor of the Irish, also, has been connected with the fact that (as Fynes Moryson's Itinerary shows) both sexes, even among persons of high social class, were accustomed to go naked except for a mantle, especially in more remote parts of the country, as late as the seventeenth century. Where-ever primitive races abandon nakedness for clothing, at once the tendency to disease, mortality, and degeneracy notably increases, though it must be remembered that the use of clothing is commonly accompanied by the introduction of other bad habits. "Nakedness is the only condition universal among vigorous and healthy savages; at every other point perhaps they differ," remarks Frederick Boyle in a paper ("Savages and Clothes," Monthly Review, Sept., 1905) in which he brings together much evidence concerning the hygienic advantages of the natural human state in which man is "all face."
It is in Germany that a return towards nakedness has been most ably and thoroughly advocated, notably by Dr. H. Pudor in his Nackt-Cultur, and by R. Ungewitter in Die Nacktheit (first published in 1905), a book which has had a very large circulation in many editions. These writers enthusiastically advocate nakedness, not only on hygienic, but on moral and artistic grounds. Pudor insists more especially that "nakedness, both in gymnastics and in sport, is a method of cure and a method of regeneration;" he advocates co-education in this culture of nakedness. Although he makes large claims for nakedness—believing that all the nations which have disregarded these claims have rapidly become decadent—Pudor is less hopeful than Ungewitter of any speedy victory over the prejudices opposed to the culture of nakedness. He considers that the immediate task is education, and that a practical commencement may best be made with the foot which is specially in need of hygiene and exercise; a large part of the first volume of his book is devoted to the foot.
As the matter is to-day viewed by those educationalists who are equally alive to sanitary and sexual considerations, the claims of nakedness, so far as concerns the young, are regarded as part alike of physical and moral hygiene. The free contact of the naked body with air and water and light makes for the health of the body; familiarity with the sight of the body abolishes petty pruriencies, trains the sense of beauty, and makes for the health of the soul. This double aspect of the matter has undoubtedly weighed greatly with those teachers who now approve of customs which, a few years ago, would have been hastily dismissed as "indecent." There is still a wide difference of opinion as to the limits to which the practice of nakedness may be carried, and also as to the age when it should begin to be restricted. The fact that the adult generation of to-day grew up under the influence of the old horror of nakedness is an inevitable check on any revolutionary changes in these matters.
Maria Lischnewska, one of the ablest advocates of the methodical enlightenment of children in matters of sex (op. cit.), clearly realizes that a sane attitude towards the body lies at the root of a sound education for life. She finds that the chief objection encountered in such education, as applied in the higher classes of schools, is "the horror of the civilized man at his own body." She shows that there can be no doubt that those who are engaged in the difficult task of working towards the abolition of that superstitious horror have taken up a moral task of the first importance.
Walter Gerhard, in a thoughtful and sensible paper on the educational question ("Ein Kapitel zur Erziehungsfrage," Geschlecht und Gesellschaft, vol. i, Heft 2), points out that it is the adult who needs education in this matter—as in so many other matters of sexual enlightenment—considerably more than the child. Parents educate their children from the earliest years in prudery, and vainly flatter themselves that they have thereby promoted their modesty and morality. He records his own early life in a tropical land and accustomed to nakedness from the first. "It was not till I came to Germany when nearly twenty that I learnt that the human body is indecent, and that it must not be shown because that 'would arouse bad impulses.' It was not till the human body was entirely withdrawn from my sight and after I was constantly told that there was something improper behind clothes, that I was able to understand this.... Until then I had not known that a naked body, by the mere fact of being naked, could arouse erotic feelings. I had known erotic feelings, but they had not arisen from the sight of the naked body, but gradually blossomed from the union of our souls." And he draws the final moral that, if only for the sake of our children, we must learn to educate ourselves.
Forel (Die Sexuelle Frage, p. 140), speaking in entirely the same sense as Gerhard, remarks that prudery may be either caused or cured in children. It may be caused by undue anxiety in covering their bodies and hiding from them the bodies of others. It may be cured by making them realize that there is nothing in the body that is unnatural and that we need be ashamed of, and by encouraging bathing of the sexes in common. He points out (p. 512) the advantages of allowing children to be acquainted with the adult forms which they will themselves some day assume, and condemns the conduct of those foolish persons who assume that children already possess the adult's erotic feelings about the body. That is so far from being the case that children are frequently unable to distinguish the sex of other children apart from their clothes.
At the Mannheim Congress of the German Society for Combating Venereal Diseases, specially devoted to sexual hygiene, the speakers constantly referred to the necessity of promoting familiarity with the naked body. Thus Eulenburg and Julian Marcuse (Sexualpädagogik, p. 264) emphasize the importance of air-baths, not only for the sake of the physical health of the young, but in the interests of rational sexual training. Höller, a teacher, speaking at the same congress (op. cit., p. 85), after insisting on familiarity with the nude in art and literature, and protesting against the bowdlerising of poems for the young, continues: "By bathing-drawers ordinances no soul was ever yet saved from moral ruin. One who has learnt to enjoy peacefully the naked in art is only stirred by the naked in nature as by a work of art." Enderlin, another teacher, speaking in the same sense (p. 58), points out that nakedness cannot act sexually or immorally on the child, since the sexual impulse has not yet become pronounced, and the earlier he is introduced to the naked in nature and in art, as a matter of course, the less likely are the sexual feelings to be developed precociously. The child thus, indeed, becomes immune to impure influences, so that later, when representations of the nude are brought before him for the object of provoking his wantonness, they are powerless to injure him. It is important, Enderlin adds, for familiarity with the nude in art to be learnt at school, for most of us, as Siebert remarks, have to learn purity through art.