Lil’ Johnny asked his father for help with a homework assignment, “Dad, what’s the difference between potential and reality?” His father thought a moment, then said, “How about a demonstration? Ask your mother if she would sleep with Robert Redford for a million dollars. Then ask your sister if she would sleep with Brad Pitt for a million dollars. Come back and tell me what you’ve learned.” Lil’ Johnny was puzzled, but did as he was told. “Mom, would you sleep with Robert Redford for a million dollars?” She looked around slyly, and then with a little smile on her face said, “Don’t tell your father, but yes, I would.” Johnny then went to his sister’s room. “Sis, would you sleep with Brad Pitt for a million dollars?” His sister did not hesitate. “Omigod! Definitely!” Lil’ Johnny returned to his father. “Okay, Dad, I’ve got it. Potentially, we are sitting on two million dollars. But in reality, we are living with a couple of sluts.”