A rib tickler

Mr Smith goes to his doctor to get his wifes medical results. Doc says "I am really sorry but we have two Mrs Smiths, one has Alzheimers disease and the other has A.I.D.S. and we have got their results muddled up."Mr Smith enquires,"What should I do doctor?" Doc' replies, "Well I suggest that you take her into town, leave her there and if she finds her way home ,for Gods sake don't fuck her!"