[homer searches under the couch for a peanut]
homer: hmm...ow, pointy!
eww, slimy.
oh, moving!
ah-ha! [looks, then says remorsefully] 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 good and services.
homer: wohoo!
