When an audience member asked about a middle-aged workers' crisis, Kerry quipped: "I am 59, and I am looking for work folks."

"Actually, Sen. Kerry already has a job and I think's he's very good at it and should keep it," Dean shot back.

Kerry raised his successful battle against prostate cancer and used it to take a shot at Bush, saying, "Some have asked how a man without a prostate can be president and I want to make it clear that we've had Republican presidents without a heart." Dean, a doctor, chimed in:

"John was very nervous when he had his prostate exam that I would be doing the test," he said.

"No, I was worried you were going to do the anesthesia," Kerry replied.