No trip to the zoo ever seems to be quite complete without a visit to the monkey house. Neither is such a visit undertaken casually. It is the pièce de résistance of the whole trip, or perhaps even its raison d'être. No matter with how much fascination we wander in and out of the bird house, the reptile house, the mammal house, the bear house, and the lion house, we are always drawn finally and irresistibly, perhaps by some atavistic urge, to the monkey house. Here we stand transfixed and spellbound while these tiny ancestors chatter, scream, cavort, cajole, swing, hug, scratch, and perform all sorts of unmentionable monkeyshines for our benefit. And no matter how tired we may be, we always feel our spirits lift and we come away refreshed. It seems to be true: Monkeys have more fun than people. After all, who has ever seen a depressed