Smart Doctor

The lady said to her doctor......"I just hope it's not Alzeimer's. Maybe there is some kind of memory medicine you can give me. See, I am getting very forgetful. I lose track of where I am, where I'm going, what I am doing and what I am supposed to do when I get there. Doctor, do you have any adive for me?

The doctor promptly said to her..............."Pay me in advance"!!