Husband walks into the bedroom carrying a sheep.

His wife is in bed reading a book. He stands at the foot of the bed and says, "See honey, this is the cow I fuck when you have a headache." The wife puts the book down and looks at her husband. "If you weren't so stupid" she replies, "you'd realize that's a sheep, not a cow." "Well" says the husband, "if you weren't such a bitch you'd realize I wasn't talking to you."