Worried patient: "Doctor, I"m very worried. I"m still suffering from exhaustion and fatigue when I come home from work every evening."
Doctor: "Oh, that's nothing to worry about. Just have a few drinks before your dinner - that will soon wake you up."
Patient: "Thanks very much, doctor! But when I consulted you before, you told me to cut out drinking alcohol completely."
Doctor: "Yes, so I did. But that was last week, old chap - and medical science has progressed enormously since then."