A college freshman comes home after being away all semester. Aer father looks her up and down, then says, "Aren't you a lot fatter than when you went away?"
"Yes, I am, Dad," the girl admits. "I weigh 140 pounds, stripped for gym."
The father stares at her for a moment in horrified amazement. Finally, he shouts, "Well, tell me this: Just who in the devil is Jim?"