Dorothy Tennov

Dorothy Tennov is a psychologist whose research on romantic obsession helps Gary D. Chapman distinguish the intensity of falling in love from the ongoing practice of loving a spouse. Her role is chiefly intellectual: she supplies a time frame and a term for the initial experience, helping explain why its eventual decline need not mean that a marriage was founded on false feeling or must end.

Research on Romantic Obsession

Tennov conducted long-range studies of the in-love phenomenon, studying scores of couples. Her findings are presented as evidence that romantic obsession has an average life span of two years, though a secretive love affair may last somewhat longer. The book describes the change that follows as a return from emotional exhilaration to ordinary life, when partners notice irritating traits, hurtful behavior, and differences previously obscured by the intensity of the experience.

Her research gives a temporal shape to an experience that couples may have mistaken for permanent. The contrast is not between sincere feeling and deceit: the initial feeling is real, but expecting its euphoric form to last indefinitely is, in the book’s account, a mistaken expectation. When the emotional high subsides, the ordinary frictions of married life become newly visible, and partners may wonder why they married or conclude that their love has disappeared.

Limerence and the Meaning of Falling in Love

Tennov coined the word “limerance” to distinguish the in-love experience from what she considered real love. The distinction supports the book’s broader argument that emotional intensity, however powerful, is not identical to a durable commitment. The in-love state can feel as though a couple has reached the summit of happiness, but it does not itself ensure either partner’s continued growth or the sustained care that marriage requires.

The book places Tennov’s terminology alongside psychiatrist M. Scott Peck’s critique of falling in love. Peck argues that the experience is not a conscious choice, requires little deliberate effort, and does not foster personal growth in the beloved. Tennov’s contribution is narrower and specific: she names the state and studies its duration, giving the author a way to describe its difference from enduring love without dismissing the force of what people feel while it lasts.

From Infatuation to Chosen Love

The account of Tennov’s findings prepares the book’s shift from romantic obsession to the daily decision to meet a spouse’s emotional need for love. The initial experience may temporarily make a person feel admired, valued, and secure; once it fades, those feelings will continue only if the partners learn how to communicate love in ways the other recognizes. Gary D. Chapman presents learning a spouse’s primary love language as a deliberate practice rather than an automatic continuation of infatuation.

That framework also recasts what can look like the end of love. If a spouse does not speak the other’s primary love language, the emotional “tank” gradually empties, and unmet needs can leave a person vulnerable to falling in love with someone else. Tennov’s account of the limited life of romantic obsession thus functions not as a prediction that marriages must fail, but as background for the book’s central distinction: the early emotional high may pass, while love can be sustained through chosen, attentive action.