While making love to his wife, Carl discovered he couldn't enjoy it. Though they had been married only a few years, he relflectly unhappily, their love-making had become infrequent and bland. Then quite suddenly, alarmed, he said: "What happened, did I hurt you ?" "Why no, not at all," said his surprised wife. "Whatever made you ask that ?" "Well, no reason actually," the bored husband replied with a sigh, "It's just that for a moment there, I thought you actully moved."