An accountant, an artist and an engineer are having drinks
The conversation turns to the most important person in their lives.
The accountant says his wife is his rock, his stability, the foundation of their life together.
The artist says his mistress is his muse and inspiration. He owes her his very soul.
The engineer says those are great, but the best is to have both a wife and a mistress.
“Both?!?” the accountant and artist exclaim together.
Yes, the engineer explains. First, you tell your wife you’re with your mistress. Then you tell your mistress you’re with your wife. Then you can go to the lab and finally get some work done.