It has been asserted that masturbation is a frequent or constant cause of acne at puberty. (See, e.g., discussion in British Medical Journal, July, 1882.) This cannot be accepted. Acne very frequently occurs without masturbation, and masturbation is very frequently practiced without producing acne. At the same time we may well believe that at the period of puberty, when the pilo-sebaceous system is already in sensitive touch with the sexual system, the shock of frequently repeated masturbation may (in the same way as disordered menstruation) have its repercussion on the skin. Thus, a lady has informed me that at about the age of 18 she found that frequently repeated masturbation was followed by the appearance of comedones.
A. Franklin, Les Soins de Toilette, p. 81.
W. James, Principles of Psychology, vol. ii. p. 347.