Dr. A. B. Arnold, in a paper on circumcision, read before the Academy of Medicine of Baltimore, argues that it is not difficult to divine the purposes of the prepuce, holding that it is necessary to protect the tactile sensibility of the glans, due to the presence of the Pacinian bodies which Schweigger Seidel discovered in the nerves, and that a better provision than the anatomy of the prepuce cannot be conceived for shielding the very vascular and sensitive structure of the glans from external sources of irritation and friction, that might rouse the sensibility of this organ, which, on physiological grounds, may cause early masturbation; further arguing that, the corona being undoubtedly the most excitable part of the glans, its denudation by circumcision leaves it more apt to be affected by chance titillations.[90] In this latter view of the case the preponderance of views is, however, in the opposite direction. J. Royes Bell states that, owing to the induration of the glans through the means of circumcision, masturbation and syphilis are less rife amongst the circumcised than amongst the uncircumcised.[91] M. Lallemand, whose experience in the treatment of seminal emissions is of the greatest value, looked upon circumcision as one of the means of curing those diseases, looking on the diminished irritability of the glans resulting from the operation as the curative element.[92] Dr. Cahen, in a "Dissertation sur la Circoncision," in 1816, before the Faculty of Medicine of Paris, called the attention to the diminished sensibility of the glans induced by circumcision. Dr. Vanier, of Havre, looks upon the prepuce as the most frequent cause of onanism. "If the prepuce is lax, its mobility produces an irritation to the highly irritable and sensitive nervous system of the child by the titillation in its movements on the glans; if too tight and constricted, then it compresses the glans, and by its irritation it leads the child to seize the organ."[93] So that in either case he looks upon the prepuce, through the sensitiveness it retains and induces in the glans, as the principle cause of masturbation. M. Debreyne, the Trappist monk and physician of La Trappe, who has paid considerable attention to medicine as applied to morality, practically makes the same observations. In children who have not yet the suggestions of sexual desire imparted by the presence of the spermatic fluid, the presence of the prepuce seems to anticipate those promptings. Circumcised boys may, in individual cases, either through precept or example, physical or mental imperfection, be found to practice onanism, but in general the practice can be asserted as being very rare among the children of circumcised races, showing the less irritability of the organs in the class; neither in infancy are they as liable to priapism during sleep as those that are uncircumcised.