doctor: Good morning,sir. How are you feeling today?
patient: Good morning doc. I think I am losing my memory.
doctor: How long have you had it?
patient: How long have I had what?

JOKE 2
DOCTOR-FATHER
FATHER: Doctor I think my son has swallowed a fountain pen.
DOCTOR: What are you doing in the meantime?
FATHER: I am writing with a pencil.