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. ↗
You know, as long as you do everything in moderation, you don't go overboard, you don't, you know, turn your lips into guppy lips - I mean, a little zip or a little zap, that is not a big deal. ↗