An architect, an artist and an engineer 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 engineer said, "I like both."
"Both?" they asked.
Engineer: "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 lab and
get some work done."