The Funniest Joke in Germany

A general noticed one of his soldiers behaving oddly. The soldier would pick up any piece of paper he found, frown and say: “That’s not it” and put it down again. This went on for some time, until the general arranged to have the soldier psychologically tested. The psychologist concluded that the soldier was deranged, and wrote out his discharge from the army. The soldier picked it up, smiled and said: “That’s it.”
The study was conducted through the Laugh Lab Web site: www.laughlab.co.uk

And might I add, as a free bonus to InnocentEnglish.com visitors, the funniest kids joke ever, perfect for every four year old:
Knock knock.
Who’s there?
Poop!

(Yes, that’s the whole joke. Subtle, yet multi-layered, it works on so many levels for all ages- as long as they are four. Skeptical? Try it on any four year old. Note that the word “poop” may be replaced by any number of equally hilarious substitutes limited only by imagination and the vocabulary of the target audience).