The difference between sluts and whores is that one has sex for free while the other gets paid. Oddly when you call someone a whore there's more of a sting to it. But whores are arguably much smarter, because they profit off their promiscuity. On the other hand, sluts only have sex with guys they want to have sex with, which is not quite true for whores.
Men who have sex with infinite women are regarded as "players" and "dogs," usually by women who thought the men who "played" them were in love with them, as well as men who pretend they're sanctimonious and morality-driven whereas in reality they lacked the opportunity to become dogs. Men can't technically be whores, at least when it comes to sex, because few are willing to pay for their services, that is outside of intrepid New York Post writers on assignment.
By the way, this is another secret post, un-Twittered or Facebooked, so consider yourself lucky if you stumbled upon it.