• I knew that if I woke up hung over, I couldn't do the best possible job on the show, so I had to quit. Also, I'd consumed a lot of beer for a lot of years, and I thought, That's enough. I've had my fun and I'm glad I quit.

    "David Letterman's 1984 Playboy Interview. A Candid Conversation with the Comedy Genius In His Youth". Playboy Interview, April 3, 2014.