Brain: It proved that radio was a powerful tool. And now, Pinky, the advance of technology has brought us an even more powerful tool. Do you know what that is? Pinky: Ummm... the rubber band? Brain: The Workings of you mind are a mystery to me Pinky.
[Homer searches under the couch for a peanut] Homer: Hmm...ow, pointy! Eww, slimy. Oh, moving! Ah-ha! Oh, twenty dollars...I wanted a peanut! Homer's brain: Twenty dollars can buy many peanuts! Homer: Explain how. Homer's brain: Money can be exchanged for goods and services.