When did lecherousness, in Western Culture, become a primarily male quality, instead of a female one?
According to TvTropes:
Very much Newer Than They Think. In ancient times (Rome, Greece, etc.) being lecherous was considered a distinctively female characteristic; All Women Are Lustful in those settings. For a man to be described as a slave to his urges was a major insult to his masculinity.
This is a Cyclic Trope, having been popular historically, especially in ancient Greece. Back then, this trope actually replaced All Men Are Perverts: it was assumed that women were too sex-crazed to say no to sex, while men were supposed to hold back for the sake of propriety; being too sexual with women was an insult to a man's virility. Although mostly a Forgotten Trope and/or Discredited Trope today, this trope made a comeback in the early eighties in which beautiful sexually adventurous women are the ones who pick up guys and initiate sexual encounters.
Or... is TvTropes wrong? And I should do more research?