Curious boy walks up to his dad and asks him what the difference is between 'theoretically' and 'realistically'. His dad thinks for a minute then instructs his son to ask his mom if she'd sleep with the milkman for ?500,000. The son asks his mom and, after thinking for a moment, she admits she would. After hearing this, the father nods and instructs his son to ask his sister if she'd sleep with the postman for ?500,000. The son asks his sister and, after thinking for a moment, she admits she would. After hearing this, the father says, "There you have it son. 'Theoretically', we're sitting on a cool ?1,000,000 but 'Realistically' we're living with two slappers!"