Because director James Cameron milks audience lust
                                
                                
                                    (Newser) -
                                    OK, they're small, but Na'vi women definitely have them: Breasts. But why? They're extraterrestrials, not mammals, who don't need them to nurse their babies. So why are they there? Simple. "Because this is a movie for human people," director James Cameron explained in an  Inside the Actors Studio...