Guy takes wife to the Doctor

Doc, I don’t really know how to explain what’s wrong with here and she doesn’t know either, but she ain’t the same. Doc examines her for two hours, all kinds of tests. Finally proclaims it’s either AIDS or Alzheimer’s. Husband asks what do I do with her now. Doc says “Drop her off a mile and a half from home at the end of the neighborhood, if she makes it back, don’t screw her.