A married man and his secretary were having a torrid affair. One afternoon they couldn't contain their passion, so they rushed over to her place where they spent the afternoon making passionate love. When they were finished, they fell asleep and didn't wake up until 8 o'clock. They got dressed quickly. Then the man told his secretary to take his shoes outside and rub them on the lawn. Bewildered, she does as he asks (thinking he was pretty weird).
The man finally gets home and his wife meets him at the door. Upset, she asks where he's been. The man replies "I cannot tell a lie. My secretary and I are having an affair. Today we left work early, went to her place, spent the afternoon making love then fell asleep. That's why I'm late."
The wife looks at him, takes notice of his shoes and says, "I can see those are grass stains on your shoes. YOU GODDAMN LIAR!!! You've been playing golf again, haven't you!?"