We fill a bathtub with water

A man to a psychiatrist: “How do you select who should be admitted to your facility?”

The psychiatrist replies: “We fill a bathtub with water and give the person a spoon, a cup and a bucket. Then we ask that person to empty the bathtub.”

The man smiles: “Ah, I understand, if you are sane you would take the bucket.”

The Psychiatrist replies: “No, a sane guy pulls the plug. Do you want a room with or without a balcony?”