During a visit to the mental asylum, a visitor asked the Director what the criterion was which 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. “
This joke is included in the Black Book of Jokes. You can order it from here.