A teenager comes home from school with a writing assignment. He asks for help from his father. “Dad, can you tell me the difference between potential and reality?”

His dad looks up, thoughtfully, and says, “I’ll show you.” Go ask your mother if she would sleep with Robert Redford for a million dollars, and then go ask your sister if she would sleep with Brad Pitt for a million dollars. Then tell me what you have learned.”

The kid is puzzled, but he decides to see if he can figure out what his father means. He goes to his mother and says “Mom would you sleep with Robert Redford for a million dollars?” His mom looks around slyly and says with a smile, “Don’t tell your father, but yes, I would.”

Then he goes into his sister’s room and asks her, “Sis, if someone gave you a million dollars, would you sleep with Brad Pitt?” His sister looks at him and says, “Omigod, definitely!”

The kid goes back to his father and says, “Dad. I think I’ve figured it out. Potentially, we’re sitting on two million bucks, but in reality, we’re living with a couple of whores.”