I teach this somewhat differently, because these behaviors vary strikngly depending on what is being purchased.

I begin with asking various students to tell me about their cars: what do they drive, do they like it, did they get a good deal....it becomes clear after a few students that almost everyone likes their car a lot and everyone got a good deal on their car. How is this possible? I ask.

Then I ask them about toilet paper...turns out that people don't remember buying it, and just buy whatever seems like a good deal at the time, frequently buying generic or house brands. Nobody talks about how much they like the toilet paper.

Finally, I ask about the most important piece of jewelry or art they have purchased--often an engagement ring. Turns out nobody cares about getting a great deal on an engagement ring...because theyre buying more than just a rock and a band of metal.

Depending on what we buy, we fall into different categories.

For real fun, I should post my lecture on how much a small cardboard box is worth. If it's that tiny blue box you get when you buy something from Tiffany & Co., that 2 inch cardboard cube costs about $2500. And it's worth every penny to many people...