Perel lists numerous examples of clients’ sexual fantasies, whether acted out or only imagined. Catherine roleplays as a highly paid sex worker with her partner, reversing a lingering sense of rejection from adolescence; Daryl engages in bondage scenarios that provide safe expression for aggression he fears in daily life; Lucas’s intentional “straight-acting” fantasy in some public environments reclaims power over his closeted past as a gay teenager; Emir imagining a threesome offers the abundant attention his partner, Althea, no longer provides after their baby arrived. Sexual fantasies, historically condemned as sin or perversion, can now be recognized as a healthy, creative force. Fantasy repairs past wounds, compensates for present frustrations, and transforms inhibitions into arousal.

Fantasy encompasses any mental activity generating desire, not just elaborate scenarios. When Claudia, married to Jim, claims she does not fantasize, the author reveals her detailed seduction wishes are fantasy—desire shaped by imagination rather than reality. However, most people remain silent about their inner erotic lives, constrained by shame, fear of judgment, or arousal conflicting with their moral convictions. Ralph, living with Sharon, feels tormented by his fantasy about a lusting 17-year-old, whom he would never actually be attracted to, and struggles to reconcile his self-image with these thoughts. Perel asserts that fantasies don’t respect traditional expectations or moral structures; they thrive on transgression.

The chapter’s central case involves Joni, a recovering alcoholic whose elaborate cowboy fantasies trouble her—she fears being masochistic like her mother, who stayed with a man that never asked what she wanted. Through therapy, Joni discovers her fantasy addresses core conflicts around dependency and vulnerability. The cowboys provide attention and care while absolving her of the emotional labor of initiating intimacy. Since Ray’s consistency initially attracted her but now feels passive, the fantasy also allows a vicarious expression of female sexual aggression through male characters—a cultural workaround for women’s forbidden lust.

Understanding her fantasy’s meaning liberates Joni from shame, enabling new assertiveness with Ray without disclosing specific content to him. Disclosure, however, is not always wise. When Amanda discovers her partner Nat’s pornography collection, all centering around a specific kink, she feels inadequate. The author explains these objectified women neutralize male vulnerability by being perpetually responsive. The chapter concludes that fantasy—whether private or shared—is a powerful tool for sustaining desire by navigating personal and cultural obstacles to pleasure.

The chapter opens with a Talmudic parable where Rabbi Bar Ashi’s wife disguises herself as Haruta, the quintessential sex worker in ancient Babylon, to test him, revealing that even imagined transgression threatens marital boundaries. Modern monogamy, defined as one partner at a time rather than one partner for life, remains the rigid cornerstone of committed relationships despite high divorce rates and infidelity. This insistence stems from both cultural tradition and psychological need. Historically about property and lineage, fidelity now expresses romantic love. Our quest for “the one” who fulfills all needs reflects an unconscious yearning to recapture the primordial oneness akin to the bond between infant and mother. Fear of loss in a culture where everything feels increasingly disposable intensifies people’s grip on sexual exclusivity.

Doug married Zoë believing he had hit the “matrimonial jackpot,” but as her attention shifted to children and extended family, he felt irrelevant. A five-year affair with Naomi, a redheaded retail buyer, provided the attention and excitement missing at home. When Naomi began seeing Evan and demanded fidelity, Doug’s jealous obsession revealed the absurdity of expecting faithfulness in inherently unfaithful arrangements. The author adopts a morally neutral stance, exploring how affairs serve multiple functions—from rebellion to replenishment—and notes Doug never wanted to leave his stable marriage. The structure of affairs naturally fuels passion through secrecy, risk, and freedom from domestic minutiae.

The chapter introduces “the third”—the real or imagined other who defines every couple’s boundaries—quoting Adam Phillips’ work, Monogamy (1996), to claim that a couple needs “to have enemies” if it’s to last. In Stanley Kubrick’s film Eyes Wide Shut, Bill is devastated when his wife Alice confesses a powerful fantasy about a naval officer she never met, showing how even imagined others threaten fusion. Some couples respond with “fortress love”—excessive monitoring and rules that often backfire. Others playfully acknowledge the third: Selena and Max enjoy flirting; Wendy surprises George in a wig; Gerard asks Elsa about her attractions to other men at conferences.

The author presents consensual nonmonogamy as one approach, citing Joan and Hiro (swingers), Eric and Jaxon (emotionally monogamous gay partners), Arlene and Jenna (lesbian couple with an open arrangement), and Marguerite and Ian (open marriage with clear rules). These couples redefine fidelity as emotional loyalty rather than sexual exclusivity, though they remain vulnerable to betrayal through breached agreements. The chapter concludes that acknowledging a partner’s erotic separateness—their unowned sexuality—paradoxically sustains desire by reintroducing mystery and possibility.

Many people experiment sexually outside relationships while remaining tame at home, revealing a cultural divide between safe domesticity and dangerous eroticism. Though biochemistry suggests romantic passion naturally fades (anthropologist Helen Fisher notes the hormonal mixture that spurs romance lasts only a few years), marriage need not mean erotic death. However, sex therapist Dagmar O’Connor observes that the burden of meaningful married sex eliminates playful, angry, quick, or naughty encounters. The companionate model emphasizes cooperation over the complicity and playfulness that eroticism requires.

Jacqueline and Philip, married 10 years, trace their sexual decline to his marriage proposal. Philip’s family history—a philandering father and grandfather—led him to split respectable love from transgressive desire. For eight years, he cycled through affairs, remorse, and reconciliation while believing he could not express raw sexuality with the mother of his children. Jackie, whose self-worth depends entirely on Philip’s desire, learned early to minimize her needs. When she initiates sex, he feels pressured rather than tempted.

The author recommends Jackie reclaim her sexuality by flirting with other men, freeing Philip from being her sole source of validation. She also suggests they create separate email accounts for erotic correspondence, using pseudo-anonymity to dismantle inhibitions. Jackie’s growing confidence and assertiveness intrigue Philip, who discovers she can be graphically sexual without needing to be protected or taken care of. Jackie realizes she has the strength to leave, which paradoxically empowers her to stay and embrace varied sexual experiences.

The chapter dismantles the myth of effortless spontaneity, arguing that what seems natural early on actually requires extensive preparation. Committed sex must be intentional. When Dominick and Raoul complain about their sex life, the author compares planning an erotic space to Dominick’s elaborate gourmet cooking—both are acts deliberately planned for pleasure. The reluctance reflects an infantile wish to be loved effortlessly. Planning creates anticipation, a key ingredient of desire. Nile and Sarah illustrate this: Their Saturday dates include built-in transitions helping Sarah shift from mother to lover.

The chapter concludes with examples of couples possessing erotic intelligence who maintain playfulness through motel rendezvous, pretending to be strangers at parties, consensual adultery weekends, and simple daily affirmations. They understand desire waxes and wanes, viewing marriage as the beginning of romance rather than its end. Reconciling domestic and erotic life requires balancing security with adventure—an ongoing, willful resistance to the cultural message that marriage means passion’s death.