From a Tennessean story about a month ago about how local radio stations deal with explicit lyrics:
Popular stations receive more than 100 songs a week and have to decide which to play. Program directors often rely on their experience and knowledge of their listening audience to make that call.
"I follow the 'hell-damn-ass' rule," said Kiki the First Lady, former program director and on-air personality of Clear Channel's The Beat. "Those are the only three you'll hear. All three of those words are in the Bible."