One morning a customer entered my flower shop and ordered a bouquet for his wife. “No card is necessary,” he instructed us. “She’ll know who sent them.”

The delivery truck hadn’t even returned to the store when the phone rang. It was the customer’s wife. “Who sent the flowers?” she asked.

After explaining that the customer had requested that no card be included, I considered the matter closed—but not so. A bit later, she came rushing in the front door. “You’ve got to tell me who sent the flowers,” she demanded, “before my husband gets home.”