A woman went to the doctors office for a physical. The doctor took a blood sample and told her to return in one week for the results.



One week later, she and her husband returned to the doctors office. The doctor took the husband aside and told him, Sir, Im afraid I have some bad news. We accidentally mixed your wifes blood sample with another patients, and we have no idea whose is whose. The bad news is one has Alzheimers disease, and the other has AIDS. I want you to come back in another week and by then I should have it all sorted out.



The man looked scared and said, Thats terrible, doc, what should I do until then?



Well, when youre driving home today, drop her off two blocks away from your house. If she makes it home, dont have sex with her!