You never know your partner as well as you think.

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.

There is no neediness in desire ... there is no caretaking in desire. Caretaking is mightily loving, [but] it's a powerful anti-aphrodisiac.

Love enjoys knowing everything about you; desire needs mystery.

Secrecy fuels erotic intensity because it makes you feel like you're doing something that is entirely yours. It gives you the sense of autonomy, the sense of freedom, and the sense of sovereignty. And then you add to that the sexual energy. In many affairs, people will tell you they slept with the person three or four times, but the story went on for months. That's an important thing because many people who have affairs often have very good sexual relationships at home. It's not necessarily a compensation story. But affairs offer a different sexuality with a different context.

For me, the constitutive element of an affair is the secrecy. It is the secrecy that leads to the lying, to the deception, to the duplicity. It is the structure of an affair - not the sexual or emotional behavior or what people actually are doing.

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