An invisible man is here to see you
Nurse: Doctor, there is an invisible man in your waiting room.

Doctor: Tell him I can't see him now. Next.

A man took his wife to the doctors...
A man took his wife to the doctors. After a short examination the doctor said"Your wife's mind has completely gone!"To which the man replied "I'm not surprised. She's been giving a piece of it to me every day for the past 25 years!"