A guy walks into the bedroom carrying a sheep in his arms and says,
    "Honey, this is the cow I make love to when you have a headache."

   The wife, laying in the bed reading a book, looks up and says,
   "If you weren't such an idiot, you'd know that's a sheep, not a
    cow."

   The guy replies, "If you weren't such a presumptuous bitch,
   you'd realize I was talking to the sheep."