Kellogg worked on the rehabilitation of masturbators, often employing extreme measures, even mutilation, on both sexes. He was an advocate of circumcising young boys to curb masturbation and applying phenol to a young woman's clitoris. In his Plain Facts for Old and Young,[8] he wrote:
A remedy which is almost always successful in small boys is circumcision, especially when there is any degree of phimosis. The operation should be performed by a surgeon without administering an anesthetic, as the brief pain attending the operation will have a salutary effect upon the mind, especially if it be connected with the idea of punishment, as it may well be in some cases. The soreness which continues for several weeks interrupts the practice, and if it had not previously become too firmly fixed, it may be forgotten and not resumed.