Letterman admitted to having affairs with female staffers during his show last night—an admission he made after someone threatened to blackmail him for it. It's weird that Letterman would first make this statement/confession/admission on the show. He put his audience in the awkward position of reacting to this as a comedy bit—which they do, until they realize, gradually, that Letterman isn't joking.

If I ever get a TV show I am not sleeping any female staffers. Ever. Just to be on the safe side I'm only going to have male staffers.

UPDATE: Via Towleroad... the staffer that Letterman had sex with—apparently before he married his long-time girlfriend—is Stephanie Birkitt, a ten-year veteran of the show. She is/was also the girlfriend of Robert Halderman, a producer at the CBS news program 48 Hours and the man who was arrested for attempting to blackmail Letterman.