You obviously don't know much about Sasha Grey do you. Shes the nastiest of the nasty, she once asked Rocco Siffredi (the avatar that appeared) to punch her in the stomach during a shoot. The game is hardly disturbing, she is though! =)
Good ol' Sasha Grey and her extreme whoreish ways have inspired some folks to make a game on her; with her appetite for deep throats and S&M being the theme.
I think You Missing the point of it. Its a novelty. The fact that someone would bother making a game about current porn stars should be enough for you to appreciate it.