The comparatively rarer female version is an "aphrodite", but shell likely be portrayed as an evil character who exploits her sexuality to manipulate innocent men.
The womanizing skills of the Casanova, on the other hand, will almost always be granted to him to make him look like a champion.
See More Friends, More Benefits for when the mechanics of a game encourage the player character to act this way.
Note: It should be mentioned that even after the affairs were over, most of Casanova's ex-lovers still liked him, and he was reputedly quite the gentleman.
The sexual predator — a man who relentlessly pursues, lands, loves, and then abandons members of the opposite sex, a skill bestowed upon him to demonstrate what a badass he is.