A visitor at a mental hospital asks the director what the criteria are for defining whether or not a patient should be institutionalized.
“Well,” said the doctor, “we fill up a bathtub, then we offer a teaspoon, a teacup, and a bucket to the patient and ask him or her to empty the bathtub.”
“Oh, I understand,” said the visitor. “A normal person would use the bucket as it’s bigger than the spoon or the teacup.”
“No,” replied the director. “A normal person would pull the drain plug. Do you want a bed by the wall or near the window?”