I guess this would be the man's idea of what it means to be a whore. Probably men who only fantasize using whores and have not actually tried it. They tend to not be beautiful, charming or express pleasure. Typically, after a while, whores loose the ability to respond sexually. It remains true that they must earn money though.
Women do not become whores because they love sex. Women who love sex (as most of them do) are not whores.
Typically, men who use whores will have wives at home whom they feel unable to enjoy sex with. It is the wife on a pedestal syndrome. The perfect woman on the pedestal cannot be sexual, she is pure and untouchable. So the guy goes to the prostitute where he can get satisfaction.
Leaving the poor wife without the sex life she needs as a woman.