A couple were married for 40 years. When they first got married, his new wife told the man "I am putting a box under the bed. You must promise never to look in it". In all their 40 years of marriage he honoured her request and never looked.

However on the afternoon of their 40th anniversary curiosity got the best of him and he cautiously lifted the lid and peeked inside the box. In the box he found 3 empty beer bottles and $187.25 in small bills. He closed the box and put it back under the bed. Now that he knew what was in the box, curiosity was doubled as to why. That evening they were out for a special dinner at their favourite restaurant. After dinner the man could no longer contain his curiosity and confessed, "I am so sorry. For all these years I kept my promise and never looked. However today the temptation was just too much. I gave in and looked in the box. But now I need to know why do you keep the bottles in the box?" The woman thought for a while and answered "I guess after all these wonderful years you deserve to know the truth. Whenever I was unfaithful to you I put an empty beer bottle in the box under the bed to remind myself not to do it again." The man was stunned and said, "I am very disappointed and saddened but I guess during those years when I travelled away from home on business temptation would happen and I guess that 3 times is not that bad considering the years." They hugged and made their peace. A little while later the man asked his wife, "What about all that money in the box?" To which she answered, "Whenever the box filled with empties, I cashed them in."