"ktorý sa zrazu zjavil od polovice 18. storočia, keď dovtedy masturbácia bola hriechom, ale relatívne tolerovaná prax"

toto mi nejak nejde dohromady s tym, ze v stredoveku boli v roznych statoch zavedene velmi tvrde tresty za masturbaciu:

"During the 15th century.... Masturbation was also a crime in the courts of many countries in Europe. Although it was rarely discovered and brought to a court's attention, masturbators could suffer extreme civil penalties, including exile (Stengers & Van Neck, 2001, 20, 24-6). In 1532, Emperor Charles V's "Penal Rules" actually established the death penalty for masturbators, people who had sex with someone of the same sex, and users of contraceptives."
http://www.plannedparenthood.org/resources/research-papers/masturbation-stigma-sexual-health-26785.htm