Jack Benny was, without a doubt, the bravest comedian I have ever seen work. He wasn't afraid of silence. He would take as long as it took to tell the story.
It's getting harder and harder to differentiate between schizophrenics and people talking on a cell phone. It still brings me up short to walk by somebody who appears to be talking to themselves.
It was a decision to work clean. I just prefer to work that way. I have no problem with comedians who don't work that way. There was a temptation in the early '70s to reconsider. I decided against it.