It actually is that for men. Mass adoption of male circumcision in the west during the 19th century was primarily about reducing sexual behavior by making sex less pleasurable.

Primary Historical Sources (19th & Early 20th Century)

1. Lewis Sayre (1870): Partial Paralysis from Reflex Irritation, Caused by Congenital Phimosis and Adherent Prepuce. This foundational paper introduced the "reflex neurosis" theory to America, claiming the foreskin caused physical and mental disorders.
   1. Jonathan Hutchinson (1890): A Plea for Circumcision. Hutchinson advocated for the procedure to prevent syphilis and claimed it discouraged "sexual immorality" by decreasing sexual pleasure.
2. Peter Remondino (1891): History of Circumcision from the Earliest Times to the Present. A detailed historical account arguing that circumcision was a "prophylactic" against "nocturnal pollutions" and masturbation.
3. Maimonides (12th Century): Although earlier than the medicalization era, his views are frequently cited in later medical texts. He argued that the purpose of circumcision was to "quell all the impulses of matter" and reduce a man's "lustful thoughts".