A farmer goes into his barn and puts a leash on one of his sheep.
He leads it to the house and takes it upstairs to his bedroom.
He opens the door and laying on the bed is his drunk wife.
On the nightstand is a half empty bottle of tequila.
The farmer says, "This is the PIG that I sleep with, when you have a headache."
The farmer's wife says, "You damn fool! That's not a pig!"
The farmer replies, "I was talking to the ewe."