+tychodancer he makes most of his jokes about his Tourette's. So, you're both right. He has to be funny to make jokes, and he uses his Tourette's as material for his comedy shows.
Sam, you are AWESOME. Tonight I've been checking out comedians with Tourette's. . I found out tonight Bobcat Golthwaight was faking it and needed my faith restored. Anyway, from what I've seen tonight. Some are way over done, others much too underdone.... you done it just right ! Kudos to you !