Soon after my 16-year-old sister started working after school as a grocery-store cashier, I went to see how she was doing.

I tried to make myself inconspicuous as I waited to check out my purchases. Ahead of me was a young man who was flirting with my sister. Both embarrassed and amused by his advances, she continued to ring up his groceries. Finally the persistent fellow ventured, "Would you like to go out to dinner with me tonight?"

Oblivious to his questions and adhering to her employee training, she asked him, "How will you be paying?"