At a New York party, Perel finds her book topic—couples and eroticism—generates intense interest. Partygoers split into two camps on whether desire can survive long-term relationships. Romantics refuse to accept passion’s loss and keep seeking partners who will sustain intensity. Realists accept that enduring love matters more than hot sex, viewing diminished desire as inevitable. Despite their disagreement, both camps assume passion fades over time.

The author challenges this consensus, proposing that love and desire are separate needs that pull us in different directions. Drawing on Stephen Mitchell’s framework, she explains we require both security (the anchor) and novelty (the wave). Like children who explore but return to caregivers for safety, adults alternate between these needs. The challenge for modern couples lies in reconciling them, yet passion is often sacrificed for stability.

She introduces Adele, a 38-year-old lawyer married seven years to Alan, with whom she has a five-year-old daughter, Emilia. Adele appreciates her secure life but misses early excitement. She contrasts an early, lavish birthday gift to Alan—a briefcase containing tickets to Paris—with a recent offering of a DVD and his mother’s meatloaf, illustrating complacency.

The author adds the historical context that sexual satisfaction in marriage is a recent expectation born of the past half-century’s social transformations—the sexual revolution, women’s liberation, gay rights, and access to birth control. While these changes brought unprecedented freedom and individualism—including separating sex from reproduction—they dismantled traditional support systems, leaving people freer but more alone and anxious. Modern love has become overburdened, expected to cure existential loneliness as well as provide emotional sustenance.

Perel describes a typical process of falling in love in the modern era: Attraction leads to attachment, which creates fear of loss, prompting couples to seek security through habit and ritual. However, the very mechanisms that make love safer can drain vitality and breed boredom. The author suggests reintroducing uncertainty by developing new perspectives. Adele recalls seeing Alan at a work function and feeling suddenly attracted when she viewed him outside their domestic context, but she has not told him, fearing ridicule—illustrating the vulnerability inherent in eroticism.

Perel describes a pitfall of many couples, in that each partner assumes they know everything about the other. This unwillingness to know one another beyond these assumptions limits the ability for either to be authentic and explore their sexual needs. She also introduces Charles and Rose, married nearly four decades. Their dynamic cast him as mercurial and seductive and her as strong and independent, often stabilizing him. A crisis erupts when Charles, confronting mortality after several losses, wants to reconnect with exuberant traits he had suppressed. Rose feels threatened, reminding him they agreed to a calmer partnership. Charles reveals their sex life has long felt flat and that, while emotionally committed, he is no longer sexually exclusive.

The rupture becomes an opportunity as both loosen fixed roles. Their dormant sex life rekindles—her desire sparked by his elusiveness, his by seeing her care so deeply. The author concludes that mechanisms meant to make love safer often create boredom instead, and that eroticism thrives when people approach a partner’s mystery with curiosity rather than trying to control it with fear.

The author begins by asking couples about their creation story—how they met and what initially attracted them—framing love’s beginning as an imaginative act in which people magnify a beloved’s qualities and transform in their presence.

She introduces John, a stockbroker recovering from professional and emotional crises, and Beatrice, a graduate student 10 years his junior. The first six months were a blissful immersion in lovemaking and conversation. As the relationship settled into domesticity, routines grew and familiarity increased. After they moved in together and a year passed, John returned to therapy reporting that while he loved Beatrice and they got along wonderfully, they were not having sex.

Challenging the prevailing belief that good communication automatically yields good sex, the author argues that increased emotional intimacy often accompanies decreased desire. She cites a couple, Andrew and Serena, as another example: Despite Serena’s expectation that growing closeness would improve sex, it did not. Sexuality, Perel contends, is a parallel narrative to a couple’s emotional life, not simply an outgrowth of it.

She explains the core paradox that love needs both surrender and autonomy, and some distance better enables connection rather than hindering it. When intimacy collapses into fusion—when two people become one—then the need to connect sexually with another is lost because there is no other. Tying this to childhood development, she highlights the tension between dependence (fear of abandonment) and independence (fear of engulfment).

Her client John’s history shows he was his alcohol-addicted father’s target and his lonely mother’s emotional caretaker, equating love with burden. The issue is not fear of intimacy but feeling trapped by it—the more he cares for his partner, Beatrice, the less he can desire her. Drawing on psychoanalyst Michael Bader, the author notes that sexual excitement requires a degree of selfishness people overly concerned with a partner’s wellbeing cannot permit themselves.

Perel explains that Beatrice has relinquished autonomy, friends, and interests, heightening John’s sense of burden. The author suggests that Beatrice move out and reestablish independence. Beatrice gets her own apartment, applies to a PhD program, travels with friends, and earns her own money. As John becomes convinced she can stand on her own, desire begins flowing back into the space between them.

The author then presents Jimmy and Candace, young married musicians in despair over years without sex. Across her relationships, Candace has lost sexual interest once she felt loved and secure. Jimmy’s kindness feels safe but not exciting—she wants aggression, not comfortable love, likening constancy to a familiar and domestic flannel nightgown. Candace is most attracted to Jimmy when he performs onstage, separate from domestic life. Intuitively trying to create distance, she asked him to ignore her when coming home, believing that if he did not need her, he would become desirable. Jimmy could not comply, interpreting her request as rejection.

Their constant affectionate touching functions as a sexual appetite suppressant. The author intervenes by forbidding all physical contact—no cuddling, kissing, or touching—to create space. Candace admits she craves touch from anyone, and Jimmy wonders if her responsiveness is specific to him or if she’ll accept it from anyone. The intervention is difficult but begins to differentiate Jimmy as a target of sexual desire rather than simply a source of physical comfort.

Invoking psychologist Virginia Goldner’s distinction between the inert safety of permanent coziness and the dynamic safety of relationships that tolerate conflict and repair, the author emphasizes that eroticism requires otherness. She recommends cultivating separateness and a sense of personal intimacy and selfhood—what French psychologist Jacques Salomé calls a secret garden. Love seeks to close distance, while desire is energized by it, like how fire needs oxygen.

The author contrasts modern intimacy with her parents’ generation’s pragmatic view of marriage based on will and compromise. She references Tevye and Golde from Fiddler on the Roof (1964), whose definition of love centered on shared domestic life—washing clothes, raising children, sharing hardship—rather than verbal disclosure. Historically, marriage was pragmatic, but love was optional, and people often sought emotional connection in same-sex friendships.

Citing family therapist Lyman Wynne, she explains that intimacy became recognized as a need when industrialization and urban living made it harder to achieve. Our determination to connect has reached fervent proportions, with technology supplementing relationships while masking a profound hunger for genuine human contact.

The modern conception of intimacy has narrowed to primarily verbal self-disclosure—the sharing of feelings. This redefinition arose alongside women’s economic independence and their new expectations for emotional connection in marriage, bringing what the author calls a feminization of intimacy.

She identifies the first pitfall: Talk-centered intimacy often has a female bias that disadvantages men, who are socialized to perform and compete rather than express feelings. Many men use the body as a primary language for closeness. She shares her friend Eddie’s story—previously dumped for not opening up, he found lasting love with Noriko during a courtship without a shared spoken language, communicating through cooking, bathing each other, and shared experiences like viewing street art.

The second pitfall is that unrestrained disclosure does not guarantee intimacy and can become coercive. She cites a scene from the film Bliss where mandated openness in therapy causes pain when a wife confesses faking orgasms. Drawing on therapist David Schnarch, she describes how the desire for intimacy can lead to forced reciprocity and a confusion of intimacy with surveillance. When nothing remains hidden, nothing remains to seek—killing desire.

The third pitfall is that privileging talk denies the female body’s capacity to express feelings or partake in developing bonds, reinforcing the historical split between female virtue and lust and keeping women sexually confined.

She introduces Mitch and Laura, at opposite ends of the mind-body spectrum; the author was one of several therapists the couple had consulted over two decades. Laura, shaped by negative childhood messages about her body, experiences sexuality with fear and sees Mitch as sex-obsessed. Mitch, who had a positive initiation with his first love, Hillary, feels confident about sexuality but rejected in his marriage.

In therapy, each learns to understand the other: Laura sees that Mitch uses his body to communicate tenderness and connection; Mitch learns her alienation is not personal rejection. When Mitch cries, admitting heartbreak rather than anger, the author leaves them to connect physically, but they retreat to opposite ends of the couch, reverting to blame.

Abandoning talk, Perel uses physical exercises—leading, falling, pushing—to help them recognize their patterns. The exercises reveal Laura’s tendency to hold back and Mitch’s preference for passive resistance and dependence on a strong initiator. This embodied approach interrupts their verbal stalemate and helps them move into new territory.

Citing family therapist Kaethe Weingarten, the author concludes that intimacy is an interaction occurring in moments—not only in committed relationships but also between strangers, professionals and clients, or survivors of shared experiences. She advocates recognizing intimate bids in many forms, including nonverbal actions like building a bookshelf or making soup, and honoring the multiple ways people reach out to one another.