The first mate on a ship decided to celebrate with a bit of stowed-away rum. He got so drunk that he was still a little drunk the next morning. Later in the day, when the first mate had sobered up, he looked in the ship's log. He read the captain's entry for the day: "The first mate was drunk today."
"Captain, please don't leave that in the log," the mate said. "This could add months or years to my becoming a captain myself."