I am not that good with jokes. But I won't stop giving a try here.

A journalist interviews a psychiatrist and asks him how does he dignoses the mental state of the patient.

The doctor replies " it is so simple. We fill a bath tub with water and give the option to the patient that he may empty the tub with a spoon, mug or a bucket"

The journalist replies, "ok. The one who empties it with bucket would be considered normal"

The doctor replies, "No, the normal people pull the stopper to empty the tub. Now tell me should I get a bed prepare for you?"