During a visit to the mental asylum, a visitor asked the Director which is the criteria that defines a patient to be institutionalized.
"Well," said the Director, "we fill up a bathtub. We offer a teaspoon, a teacup and a bucket to the patient, and ask the patient to empty the bathtub."
"Oh, I understand," said the visitor. "A normal person would choose the bucket as it is larger than the spoon."
"No," answered the Director. "A normal person would pull the plug."