This is a great book by a great gal.
It ends like this:
For those who aspire to accelerate their heartbeat periodically, I give them the score: excitement is interwoven with uncertainty, and with our willingness to embrace the unknown rather than to shield ourselves from it. But this very tension leaves us feeling vulnerable. I caution my patients that there is no such thing as “safe sex.” I should point out, however, that not all lovers seek passion, or even, at one time, basked in it. Some relationships originate in feelings of warmth, tenderness, and nurturance, and the partners choose to remain in these calmer waters. They prefer a love that is built on patience more than on passion. To them, finding serenity in a lasting bond is what counts. There is no one way, and there is no right way.
Mating in Captivity aspires to engage you in an honest, enlightened, and provocative discussion. It encourages you to question yourself, to speak the unspoken, and to be unafraid to challenge sexual and emotional correctness. By flinging the doors open on erotic life and domesticity, I invite you to put the X back in sex.