A couple I know, Soren and Imani, went to a giant furniture store on Saturday at 10am to buy one $4 plant pot. They made a rule in the car: "Straight to the pot, straight to the exit." By 10:40 they were in the kitchen section "just looking." By noon they were arguing about a $900 sofa they had no intention of buying. At 1 p.m., they sat in the café and ate meatballs, which was also against the rules. At 2:30, Imani lay down on a display bed, looked at the ceiling and said, "I could live here." Soren lay down next to her. At 3:15, a staff member in a yellow shirt walked over and said, "Excuse me."...