The whole notion of one person being enough for everything gets instantly challenged when you start to talk with somebody about wanting more or of wanting something else. They take it personally, feel like a failure or feel that they lack something, so you don't talk about it because you don't want to hurt, offend, or scare the other person. You also don't want to be rejected or have them leave you, whatever the reason.

Affairs can be powerful detonators. They can invigorate a marriage that's flat, jolt people out of years of complacency. Fear of loss rekindles desire, makes people have conversations they haven't had in years, takes them out of their contrived illusion of safety.

There is no sex without a cue. People who date have their cues at home, before they meet. You think about where to go, what to eat, what to do and say. Sometimes the cue is short - - just before we reach the bar - - but sex is never just spontaneous. Spontaneity is a myth.

In dating, if you say no, your lover goes on to the next person. In marriage, if you say no, the person stays.

For most couples who come to me - especially in the aftermath of the revelation of an affair, when they are in a state of crisis and fear the loss of a predictable future - they start to have conversations for the first time about love, sex, monogamy, and marriage. Most couples don't negotiate or don't even converse about any of these things until the crisis of the affair has actually forced them to. Why does it take infidelity to get us talking about the stuff that should be there from the start?

People cheat on each other in a hundred different ways: indifference, emotional neglect, contempt, lack of respect, years of refusal of intimacy. Cheating doesn't begin to describe the ways that people let each other down.

I think love is often a bit selfish, even before we had consumerism. That's not new. A consumer society gives you the illusion of having massive amounts of choice and saddles you with the freedom of being able to dabble in that choice. And at the same time, you are left with the tyranny of self-doubt and uncertainty about whether you made the right choice.