David Letterman is mostly an enigma. He doesn’t socialize, is never seen on the New York circuit at movie premieres or even charity events. His wife, Regina, is not mentioned by him and rarely seen as well. There is exactly one photo of her on WireImage, for example. The best interview he ever did about himself was last year with Howard Stern. It lasted 27 minutes and was extraordinary for Letterman, who trusts Stern. Here it is:
