That approach either builds on or replaces one that was developed by Frederick Hollick in the mid 1800s and described a century and a half later in this study by April Haynes of the University of California, Santa Barbara:
“The Trials of Frederick Hollick: Obscenity, Sex Education, and Medical Democracy in the Antebellium United States,” April Haynes, Journal of the History of Sexuality, vol. 12, no. 4, October 2003, pp. 543-74. On page 555 Haynes explains: “If regimen and medication failed to heal an ex-masturbator of impotence and spermatorrhea, men could visit his New York office for a treatment that he called the shampoo, which consisted of deep tissue massage of the groin.” Here’s a fuller look at that passage:
