Academics have found evidence that the time-honoured Doctor, Doctor joke dates all the way back to Ancient Roman times. The Third Century Joke Book, Philogelos (The Laughter Lover), contains what could well be the first reference to a Doctor, Doctor joke - Doctor, Doctor, whenever I get up after a sleep, I feel dizzy for half an hour, then I’m all right. Then wait for half an hour before getting up, said the doctor. Book your doctor’s appointment before reading this book, as you are guaranteed split sides and busted guts from laughing so much at these hilarious Doctor, Doctor jokes.