During a visit to a mental asylum, a visitor asked the director what the criterion was that defined whether or not a patient should be institutionalized.
"Well," said the director, 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 because it's bigger than the spoon or the teacup.
"No," said the director, A normal person would pull the plug. Do you want a bed by the wall or near the window?