TEST. An old man stepped into the emergency room and demanded a blood test. A nurse agreed to give him just that.
REPEAT. After getting what he wanted, he left but came back minutes later and demanded for another test. The same nurse, never questioning his wisdom, granted his wish again. After it was over, he left again only to return minutes later. The nurse said, "Grandpa, there's no need for one more test."
FEAR. Grandpa said, "I'm 87 years old. I'm afraid of having high blood pressure. This fear alone could kill me."