A husband and wife who are avid golfers have been happily married for 30 years, and on the day of their 30th anniversary they enjoy a wonderful day together. They have a delicious breakfast in bed, then proceed to one of their favorite golf courses. They play through to the 9th hole, both having an amazing game. The husband watches his beautiful wife tee off and feels a rush of emotion and guilt.
"Honey, I have to tell you something. At the very beginning of our marriage, I was with another woman. It only happened once and I've been faithful ever since. It was a mistake and I hope you can forgive me."
The wife looks fondly at him. "I forgive you. We've had a very happy life together. I love you."
The husband is so relieved, feeling light as a feather. They play a few more holes in bliss when suddenly the wife turns to her husband.
"Honey, I too have something to confess."
The husband smiles and says, "Anything dear - you were so gracious to me, and we can make it through anything."
"Before we met, I had an operation. I used to be a man."
The husband throws his club down and starts swearing and kicking up turf.
The wife is in shock. "But I forgave you for your secret!"
The husband, red faced, turns to her and says, "All these years! All these years you've been teeing off from the ladies tee box you cheater!!"