Extremely Smart Humor - It happens to all of us. You're sitting with a group of friends, and all of a sudden you are overwhelmed by the urge to tell a long, somewhat improbable story that ends with a pun. Loud groans are made, and you are pelted with pillows, cushions, paper, garbage, and anything else that comes to hand. Why does this happen, and why do certain people seem to be more likely to be stricken with this dread disease? Dubbed SPS (Shaggy Pun Syndrome) by prominent psychologists, this illness has baffled scientists. What causes it