The young people look great on television. They're youthful and have a lot of zip and energy, but when you see them live, they can only do about 20 minutes because they haven't got the training to hold an audience for an hour and a half or so. ↗
There are three signs of senility. The first sign is that a man forgets his theorems. The second sign is that he forgets to zip up. The third sign is that he forgets to zip down. ↗