Bill Clinton is jogging around DC. A ho sees him and yells out, "Fifty dollars!" He's tempted, but calls back, "Five!" She turns away while Bill continues his jog.
A few days later, Bill is jogging in the same area and sees the same ho. "Fifty!" she yells. "Five!" he answers her. No sale.
The next week, Hillary decides to go jogging with Bill. They're running through the same area, and the ho is there again. She sees Bill and Hillary together and yells: "See what you get for five dollars?"