Because most newspapers won't advertise NC-17 films, studios do almost anything to ensure that their movies get an R rating.

CNN: Taking aim at show biz

Sometimes they're startled, as when the MPAA slapped the sad, thoughtful "Blue Valentine" with an NC-17, which meant it couldn't play in many theaters, be advertised in many newspapers or probably be nominated for Oscars.

WSJ: Roger Ebert on Movie Ratings

He didn't mention her name but the president recounted the comments of Rep. Virginia Foxx (R-NC) who had told a talk radio host that she had "very little tolerance" for students who graduate with large amounts of debt.

CNN: STORY HIGHLIGHTS