Wife or mistress?

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

The architect 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 accountant said: "I like both."

"Both?" The other two asked

The accountant replied: "Yeah. If you have a wife and a mistress they will each assume you are spending time with the other woman, and you can go to the office and get some work done."