He thinks he's a refrigerator

A woman went to a psychatrist and said to him. 'I want to ask you about my husband. He thinks he's a refrigerator.'

'Well that's nothing to worry about,' said the psychiatrist. 'I would say that's quite a harmless obsession.'

'Yes, but the thing is,' said the woman, 'he sleeps with his mouth open and the little light keeps me awake at night.'