A friend alerted me to this article (very much worth reading) by Mark Openheimer on monogamy: "Savage believes monogamy is right for many couples. But he believes that our discourse about it, and about sexuality more generally, is dishonest. Some people need more than one partner, he writes, just as some people need flirting, others need to be whipped, others need lovers of both sexes. We can’t help our urges, and we should not lie to our partners about them. In some marriages, talking honestly about our needs will forestall or obviate affairs; in other marriages, the conversation may lead to an affair, but with permission. In both cases, honesty is the best policy."
I’m not sure if honesty is always the best policy, but it’s definitely a policy.