What is the relationship between love and desire? How do they relate, and how do they conflict? ... Therein lies the mystery of eroticism.

Acceptance doesn't mean predictability. Sex isn't always for 11 at night - - it's also 'meet at a hotel room at noon'. What you feel during dating can exist at home, if you don't suffocate it.

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?

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.

We know desire is rooted in absence and yearning. What you don't have is often ten times richer than what you actually experience. An affair is a perfect erotic plot because it fits the erotic equation of psychotherapist Jack Morin: "Attraction plus obstacle equals excitement.".

Modern love is the enterprise that everyone wants to be a part of, yet there's a fifty percent divorce rate in round one and a sixty-five percent divorce rate in round two.

At this point, we are living one of the greatest experiments in humankind - to create something that has, throughout history, been considered a contradiction in terms - a passionate marriage. Passion has always existed, but it took place somewhere else. Everything that we wanted from a traditional marriage - companionship, family, children, economic support, a best friend, a passionate lover, a trusted confidante, an intellectual equal - we are asking from one person what an entire village once provided. And couples are crumbling under the weight of so much expectation.