The guy is a liar and I'm not defending him.
However, the definition of sex story was rather heavily spun. He was in a courtroom. They handed him a slip of paper with a definition of sex and asked if he accepted it. The definition was rather broad and he declined and presented another definition. Both definitions had been used in various legal contexts. The Jay Leno version has him just making up new definitions of obvious words whenever he feels like it. The actual events were that he was doing a standard lawyer thing, arguing which of the available definitions should apply in this case.
The guy's a lawyer. Put him in a courtroom and he's going to act like one.