MPAA under fire again after lesbian encounter gets tamer 'R'
                                
                                
                                    (Newser) -
                                    Hollywood's rating system is coming under fire again after two Oscar contenders, Black Swan and Blue Valentine, received R and NC-17 ratings, respectively. Debate is raging because both films depict oral sex scenes in essentially the same way, for the same time and with no nudity, reports the  Los Angeles ...