25th Anniversary

After celebrating their 25th wedding anniversary with a romantic dinner at a restaurant, the wife thanked her husband for a wonderful evening.
“It’s not over yet,” he said, and once back at the house, he presented her with a little black velvet box. She opened it in eager anticipation, but found nothing more than two pills inside.
“What are these pills?” she asked, puzzled.
“Aspirin.”
“But I don’t have a headache.”
“Gotcha!” he cried triumphantly.