Mental asylum

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 teacup.'
.
.
.
.
.
.
.
.
.
.
'No.' said the director, 'a normal person would pull the plug.
Do you want a bed near the window?'