The Modernist wrote:Not dumb necessarily, but I think it needs to be instinctive. Comedy that has been overly 'worked on' rarely tends to be funny, that's the main reason most sitcoms fail I think.
Comedians will take months or years to get a joke perfect or make it sound "natural.'
There's a new show out called Jerry before Seinfeld where he does all his original jokes and bits in front of a crowd - the ones he wrote before Seinfeld.
He has kept every joke he's ever written, 10,000 or so he says, which is laid out on a street in the show's opening and ending. Joan Rivers did the same thing. She had a huge file cabinet full of her "instinctive" humor, always honing it.