"Who are you? Where am I?" - Ronald Reagan Comedy isn't easy. In fact, studies* have proven that it's the most difficult and challenging of all human endeavors. It takes experienced, trained professionals to produce the kind of high-potency, refined humor that generates sustained, clean-burning laughter without unpleasant side-effects. The result of months of dedicated research and extensive animal testing, Crabs Adjust Humidity: Volume Four is comprised of 112 cards representing the very pinnacle of tasteless, juvenile humor. * You know, studies.