Mismatched libidos are the most common sexual complaint in couples therapy. The solutions are not what you expect.
The Most Common Problem Nobody Talks About
Desire discrepancy — one partner wanting sex more frequently than the other — is the most common presenting complaint in couples sex therapy, affecting an estimated 30-40 percent of couples in long-term relationships at any given time, according to research by Barry McCarthy and Emily McCarthy. It is also, therapists report, among the most shame-laden: the higher-desire partner often feels rejected and undesirable; the lower-desire partner often feels pressured and inadequate. Both feelings are understandable. Neither characterisation of the partner who drives it is accurate.
The standard framing — higher-desire versus lower-desire partner — already contains a problematic assumption: that one partner’s desire level is the standard against which the other is measured as deficient. Therapist Emily Nagoski, whose research on the dual control model of sexual response has influenced contemporary sex therapy, reframes the question: rather than “why doesn’t my partner want sex as much as I do,” the more productive question is “what conditions does my partner’s desire require, and are those conditions present in our relationship?”
The Dual Control Model
Nagoski’s dual control model, developed with John Bancroft at the Kinsey Institute, proposes that sexual arousal is governed by two systems: an excitation system that responds to sexually relevant stimuli, and an inhibition system that responds to threats, stress, distractions, and contextual factors that signal sex is not currently appropriate or safe. Individual variation in the sensitivity of each system explains much of the variation in sexual desire: people with highly sensitive inhibition systems are not low-desire by nature — they are high-inhibition, meaning they require a larger removal of inhibitory factors (stress, body image concerns, relationship tension, fatigue) before desire can emerge.
This reframe is clinically useful because it shifts the intervention target: rather than trying to increase desire directly, therapy focuses on identifying and reducing what’s pressing on the inhibition system. For many lower-desire partners, the relevant factors are nonsexual: work stress, parenting exhaustion, unresolved relationship resentment, or body image concerns that make sexual vulnerability feel unsafe.
What Research Says About Outcomes
McCarthy’s research on desire discrepancy intervention finds that outcomes are better when both partners engage with the therapeutic process rather than defining the lower-desire partner as the identified patient. The Scarleteen resources on sexual self-knowledge offer accessible frameworks for understanding individual desire patterns. The clinical consensus is that desire discrepancy is manageable in most relationships, not through one partner accommodating the other indefinitely, but through collaborative understanding of each partner’s desire system and the conditions that support it.
SOURCE: https://bohiney.com