"the air bath, as Dr.Franklin calls it, is exceedingly salutary to every one in health, and almost to every invalid. If the whole skin may be considered a breathing organ, then it should not only be kept clean, but for its own health and vigor, and the health and vigor of the whole system, it should be permitted to receive the full ...and free embrace of the pure air -- in short, all the physiological and physcological properties, powers and interests of the human constitution would be better sustained, as a permanent fact, from generation to generation, by entire nudity, than by the use of any kind of clothing. Strictly speaking, therefore, all clothing is in itself considered, in some measure, an evil."
Sylvester Graham. "Bathing, Air, and Clothing," from Graham's Science of Human Life. Water Cure Journal; 1 Jun. 1847; 3, 11.