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."