What do you think about women (or men) that whore themselves out, either through prostitution or teasing, to get what they want?
Women know that men are pigs and will do anything to tap dat ass, so they use their bodies to their advantage. This is subjective because it depends on your morals/ethics/whatever. Society gives us morals. If you think about it, there really aren't any rules in life. Nowhere in nature does it say, "It's immoral to suck a guy's penis so he'll do some ridiculous favour in return". Prostitutes/porn stars know how it goes, as well, since they completely disregard the idea that their bodies are "sacred" or whatever, so they fuck with strangers and get their hard-earned money.
Of course, this can go either way depending on the person. It could be because she's playing them all as a seductive mistress, or she's just a dumb, lazy slut that doesn't want to be productive in any way and party it up. Also, the way you think about it, the morals would only apply if you live in civilised society. You can do this shit all you want in the wild.