A friend texted this to me today...
A man took his wife to the Doctor to be checked out as she was feeling unwell.
After examining her he took the husband to one side and sighed, ' I'm afraid it's very serious; your wife has either Aids or Alzheimers .
' That's terrible ' exclaimed the man, 'but how will I know which one she's got?'
' Oh, that's easy enough Sir, just put her on a bus and if she comes home, don't shag her'