1. The reason this thing sells is down to this horrific 'cool feminist' mentality. "I'm not gonna be an old-fashioned 'lady'. If I wanna sing about SEX then I'm gonna do it. Try and stop me."
Avril Lavigne went out of fashion long ago. For a good reason.
2. Why oh why does she imitate a Californian accent? Why can't she sing in her native voice? I bet it'd sound far more novel and less embarrassing.