I don't know if there is a gene for comedy but my dad was a very funny man. He just didn't know it. He was a naturally funny character and when my brother and I would laugh at things he said and did he would say 'What do you think is so funny?'
Somehow knowing that Alzheimer's is coming mocks all one's aspirations - to tell stories to think through certain issues as only a novel can do to be recognised for one's accomplishments and hard work - in a way that old familiar death does not.