That reminds me of a joke:
A priest, a lawyer, and an engineer are discussing marriage. Specifically, is it better to have a wife or a mistress? The priest says, "It's better to have a wife. The institute of marriage is a holy institution sanctioned by God. Relations outside of marriage is a sin and must be avoided." The lawyer says, "It's better to have a mistress. Over 50% of marriages end in divorce, which is a painful, expensive, acrimonious process. Best to avoid it." The engineer says, "It's best to have a wife AND a mistress. That way, your wife thinks you're with your mistress, your mistress thinks you're with your wife, and you can go to the lab and get some work done."