He worked 77 years until 2020, when he was 99.
From the Rolling Stone link: "Jaffee explained the origins of the segment, saying it occurred to him when he was trying to fix an antenna on the roof of his house.
“Suddenly, I heard my son climbing up this ladder. He asked me a question that he asked every time he came home from school: ‘Where’s Mom?’ And I answered, ‘I killed her and I’m stuffing her down this chimney.’ He knew I was kidding, obviously, but I thought about this afterward, and it occurred to me that there must be a million times a day we all get asked questions to which you either don’t know the answer or it’s a pointless question. Up on the roof, how the hell would I know where Mom was?” "