how do I look, maaa?

A kid comes home from school with a writing assignment. He asks his
father for help. "Dad, can you tell me the difference between potential
and reality?" His father looks up, thoughtfully, and says, "I'll
demonstrate it for you. Go ask your mother if she would sleep with
Robert Redford for a million dollars. Then go ask your sister if she
would sleep with Brad Pitt for a million dollars. Then come back and
tell me what you've learned."

The kid is puzzled, but he decides to see if he can figure out what
his father means. He asks his mother, "Mom, if someone gave you a
million dollars, would you sleep with Robert Redford?" His mother looks
around slyly, and then with a little smile on her face says, "Don't tell
your father, but yes, I would." Then he goes to his sister's room and
asks, "Sis, if someone gave you a million dollars, would you sleep with
Brad Pitt?" His sister looks up and says, "Omigod! Definitely!"

The kid goes back to his father and says, "Dad, I think I've figured
it out. Potentially, we are sitting on two million bucks, but in
reality, we are living with two tramps."