Do you ever make a purchase at one store and then go around to other stores afterwards to compare prices to make sure you paid a reasonable amount for your item? It is kind of silly, as it is perhaps better to just do your comparison shopping before committing to a purchase, but it is just human nature sometimes to do it the other way around.
I have a silly story to share about the time my husband and I were visiting friends in another city. We decided we wanted to buy our friends a garlic press, as we think everyone should own one if they like to cook with garlic.