An architect, an artist, and a civil engineer were discussing whether it was better to spend time with the wife or a mistress.

The civil engineer said he enjoyed time with his wife, building a solid foundation for an enduring relationship. The artist said he enjoyed time with his mistress, because of the passion and mystery he found there. The architect said, “I like both.”

“Both?” asked the engineer and artist in unison.

The architect replied, “Yeah. If you have a wife and a mistress, they will each assume that you are spending time with the other woman, so you can go to the office and get some work done.”