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Sexuality + intimacy

Sex therapy without the shame bill.

Evidence-based, comprehensive sexology for individuals and couples working on desire, pleasure, pain, performance, or disconnect. Kink-affirming, LGBTQ+ affirming, non-monogamy-aware. Online across California.

TL;DR

Sex therapy is talk therapy with specialized training in sexuality. Nothing physical ever happens in session — no contact, no nudity, no demonstration. Christina Mathieson, LMFT #115093, holds Comprehensive Sexology certification from the Buehler Institute and works with desire, pleasure, pain, performance concerns, identity exploration, and the relational and trauma layers underneath sexual difficulty. Kink-affirming, LGBTQ+ affirming, non-monogamy-aware. Online across California.

Good fit if

  • Desire has flattened or is mismatched between you and a partner
  • Sex has started to hurt, or it's always hurt, and you want to change that
  • Performance concerns — erectile, orgasmic, pain, anxiety — are affecting your life
  • You want to understand your own sexuality better — orientation, kink, fantasy, fluidity
  • Sex feels disconnected from the rest of your relationship and you want it to feel like you again
  • You're in a non-monogamous or polyamorous structure and want practical tools
  • Past sexual trauma is shaping current intimacy, and you want a therapist who can hold both layers
  • Medication has affected your sexual function (SSRIs, hormonal birth control, blood pressure meds) and you want to talk through what's possible

Not a fit if

  • You're seeking sex therapy as a replacement for medical evaluation — some concerns need a urologist, gynecologist, or pelvic floor physical therapist first (we'll refer)
  • You're looking for someone to 'fix' a partner who isn't engaged in the process
  • You're looking for sex coaching, surrogate work, or any form of physical intervention — sex therapy is exclusively talk-based
  • You want a therapist to tell you what's 'normal' and validate that you're broken if you're outside it — that framing is what we're working against
  • You're in active untreated substance use that's driving the sexual concern — we'll address stabilization first, often via referral

Not sure which column you're in? Book a free consult. If we're not the right fit, we'll help you find someone who is.

What the work looks like

How we actually work together.

Sex therapy is talk therapy — nothing physical ever happens in session. We start with history: your sexual development, current concerns, what's worked and what hasn't, any medical factors worth coordinating with a physician. Bringing a partner is optional; individual sex therapy is just as valid. (For an overview of what sex therapy actually is and isn't, see our piece on Sex Therapy 101.)

Christina holds a Comprehensive Sexology Program certification from the Buehler Institute, which means the work isn't limited to one tool or framework. We draw from behavioral techniques, mindfulness-based interventions, attachment work, and education about sexual physiology — whatever fits the concern. When appropriate, we coordinate with your physician or pelvic floor PT.

Most clients feel a real shift in how they relate to sex within the first few sessions — often before any physical changes. The goal isn't to engineer specific outcomes; it's to help you feel more at home in your own body and relationships.

Modalities we draw from

Comprehensive SexologyGottman Method (for couples)Mindfulness-based approachesCBT

What sex therapy actually is — and what it isn't

Sex therapy is psychotherapy with specialized training in human sexuality. It's a recognized clinical specialty with its own credentialing body in the US (AASECT, the American Association of Sexuality Educators, Counselors and Therapists), its own research base, and its own scope of practice. It is not a separate kind of therapy with different rules; it's the same talk therapy, with a clinician who has been trained beyond what general therapy programs typically cover.

What sex therapy is: a confidential conversation about sex, desire, intimacy, pleasure, pain, identity, and relationships, led by a therapist who's done the training to talk about all of that without flinching, judging, or projecting their own values onto your sexuality. The work usually involves history-taking, education (about how sexual response actually functions, often very different from what you were taught), specific behavioral practices done at home between sessions, and the relational and emotional work that almost always sits underneath sexual difficulty.

What sex therapy isn't: physical, hands-on, or in-person sexual contact of any kind. There is no nudity in session, no demonstration, no touch. It's not surrogate partner therapy (a separate niche modality where surrogates are involved, not part of standard sex therapy), it's not sex coaching (which is unregulated and unlicensed), and it's not a service where you'll be told what's 'normal' or how often you should be having sex. That framing is part of what most clients are working against, not part of what we offer.

Most therapy programs cover sexuality in passing, if at all, and the gap between general training and competent sex therapy is wide. There are two legitimate paths to specialty competence: formal post-graduate certification programs (AASECT certification or the Buehler Institute Comprehensive Sexology Program are the most recognized in the US), and intensive supervised clinical practice under a clinician who has that formal training. Both are valid; the absence of either is the red flag.

The clinical models we actually work from

Most people have been taught one model of sexual response: the linear arc of desire → arousal → orgasm → resolution that William Masters and Virginia Johnson published in Human Sexual Response in 1966. This model is foundational, and it's part of what sex therapy still draws from. It also fits a minority of human sexual experience.

Helen Singer Kaplan added a desire phase before arousal in her 1979 work, which sounds obvious now but was clinically important — it made desire itself a treatable concern, not just a precursor.

Rosemary Basson's 2000 circular model was the bigger correction. Basson observed that for many women, particularly in long-term partnerships, desire often follows arousal rather than preceding it. You don't necessarily wake up wanting sex; you choose to be receptive, your body responds, and desire emerges. This isn't a defect — it's a different sexual response pattern, sometimes called 'responsive desire' as distinct from 'spontaneous desire.' The clinical implication: low spontaneous desire is not the same as a sexual problem.

John Bancroft and Erick Janssen's dual control model added another layer: sexual response is governed by both an excitatory system (sensitive to sexual cues) and an inhibitory system (sensitive to threat, distraction, body image worries, performance pressure). Some people have a sensitive accelerator and need very little to get going; others have a sensitive brake and find arousal blocked by stress, fatigue, or relational tension. Most sexual concerns are at least partly inhibitory — too much on the brake — rather than excitatory deficits.

Emily Nagoski's Come As You Are translated Bancroft and Janssen's research for general readers, and is one of the books we recommend most often. The reason it lands: most people have been operating from the wrong model of their own sexual response, and a better model relieves a lot of self-blame.

We use these models clinically. Identifying whether desire is responsive or spontaneous, whether the brake is more sensitive than the accelerator, and what specifically activates the brake (chronic stress, body image, relationship dynamics, trauma history, sleep, hormones) is most of the work. The interventions follow from the formulation.

What a sex therapy session actually looks like

The first session covers the same ground as any therapy intake — what's bringing you in, what you've tried, what's at stake. The questions that get added are about sexual development, sexual history (without requiring detail you're not ready to share), current sexual functioning, and what changes you'd want.

A common worry: that you'll be asked to describe sex acts in graphic detail. You won't. Sex therapy uses clinical language, not erotica, and the level of specificity stays at whatever helps the work. You can also tell us at any point that something is too much to talk about yet, and we'll find another way in.

Many sex therapy concerns benefit from between-session practices. These are sometimes called 'homework' but they're really just structured experiments you try at home. Common examples: sensate focus exercises (touch-based, designed to remove performance pressure), mindfulness practices for present-moment attention during intimacy, communication scripts for talking with a partner about desire, or specific behavioral approaches for sexual pain or performance concerns. We design these collaboratively with you, and we debrief in the next session.

Sessions are 50 minutes, weekly to start, secure video. The pacing is yours. Some clients want to move fast; others want long stretches of educational and reflective work before any behavioral practice. Both are valid and both produce results.

Common concerns sex therapy helps with

Mismatched or low desire. The single most common reason couples come to sex therapy. Often, one partner has spontaneous desire, the other has responsive desire, and neither knows that — they've been interpreting the difference as a deficit in one of them. Treatment usually involves education, addressing the relational layer (resentment, distance, distraction), reducing the brake (stress, body image, performance pressure), and building rituals of physical connection that allow responsive desire to emerge.

Sexual pain. Conditions like provoked vestibulodynia, vaginismus, dyspareunia, vulvodynia, and pelvic floor dysfunction sit at the intersection of sex therapy and pelvic floor physical therapy. We coordinate with a pelvic floor PT and your gynecologist when relevant. The sex therapy piece works on the protective tension and anticipation that keep pain cycles running, alongside the medical and physical interventions.

Erectile concerns. Erectile dysfunction can be primarily medical (cardiovascular, diabetes, low T, medication effects), primarily psychological (performance anxiety, partner-monitoring, self-monitoring), or both. We always recommend a urology consult to rule out medical contributors. The sex therapy work targets the psychological layer — the moment-to-moment attention shifts that pull arousal off-track and the relational dynamics that maintain anxiety.

Orgasmic and ejaculatory concerns. Anorgasmia, premature ejaculation, delayed ejaculation. Each has both behavioral and relational components, and the protocols are well-established.

Identity exploration. Sexuality, gender, kink, fluidity, polyamory, asexuality. Sex therapy isn't only for problems; it's also a place to explore who you are sexually with someone trained to hold the conversation without judgment or agenda.

Post-trauma intimacy. Survivors of sexual trauma often face specific sexual difficulties that general talk therapy doesn't always address well. We integrate trauma-informed work (often EMDR or somatic approaches) with the sex therapy proper. (See also our trauma therapy page.)

Sexual side effects of medications. SSRIs, hormonal contraceptives, blood pressure medications, and some other classes can cause libido, arousal, or orgasm changes. We work alongside your prescriber on what to do — sometimes that's a medication change, sometimes it's psychological work to navigate the side effects, often both.

Compulsive or out-of-control sexual behavior. When sexual behavior feels driven, distressing, or interferes with values and relationships. The clinical formulation matters — this presentation can be addiction-coded, trauma-coded, or values-conflict-coded — and the right approach depends on which.

For more on what sex therapy changes beyond the sex itself, see What Sex Therapy Changes, Beyond the Sex. For how mindfulness fits in, see Mindfulness Techniques & Sex Therapy.

Individuals, couples, and non-traditional relationship structures

Sex therapy is often associated with couples work, but a substantial portion of the work is individual. Common individual reasons: working through sexual trauma, exploring identity privately before bringing anything to a partner, processing a sexual experience that didn't go the way you wanted, working on body image and pleasure, or simply learning about your own sexuality with someone trained to help you do that.

Couples sex therapy adds the relational layer. Most couples concerns aren't really about technique — they're about the dynamics of safety, distance, resentment, and communication that shape what's possible in the bedroom. We use the Gottman Method where appropriate alongside the sex therapy proper, and we treat sexual concerns as part of the larger relationship system rather than as isolated mechanical problems.

Non-monogamous and polyamorous structures get the same affirmative, structure-aware approach. We don't pathologize ethical non-monogamy, polyamory, swinging, relationship anarchy, kink, BDSM, or fetish. We work with the structure you're practicing — communication, attachment, jealousy, time and energy, agreements, and the specific tensions that come with multiple partners. Michelle Cortez, AMFT #146795 (supervised by Christina Mathieson, LMFT #115093) is the clinician on our team whose practice specifically focuses on ENM, kink, BDSM, and fetish-affirming care; clients who want a therapist whose work centers these populations can request her directly. Christina holds AAMFT LGBT-Affirmative Therapy certification and works with these populations as part of her broader sex therapy practice.

LGBTQ+ clients benefit from a sex therapist who treats queer, trans, and non-binary sexuality as the working subject, not a side concern that needs translation. You won't spend the first few sessions teaching us what your terms mean. (See also our LGBTQ+ affirmative therapy page.)

The credentials that matter (and why)

Sex therapy isn't a regulated specialty in the same way that, say, medical specialties are. Anyone with a therapy license can list 'sex therapy' as an interest. The training that distinguishes a clinically competent sex therapist from a generally trained therapist who occasionally talks about sex is specific, structured, and ongoing — typically through post-graduate certification, supervised practice under a sex-therapy-trained specialist, or both.

[AASECT](https://www.aasect.org/) certification is the most recognized US credential for sex therapists. AASECT-certified therapists have completed extensive training, supervised hours, and continuing education in human sexuality. The AASECT directory is a reliable place to start when looking for a sex therapist anywhere in the country.

The [Buehler Institute](https://www.learnsextherapy.com/) Comprehensive Sexology Program is the certification Christina holds. It's a rigorous program covering sexual development, sexual function and dysfunction, sexual identity, kink and non-monogamy, sexual trauma, ethical practice, and the integration of sex therapy with other clinical modalities. The Buehler program is AASECT-aligned and is recognized as a strong foundation in the specialty.

Supervised practice under a sex-therapy-trained specialist is the other legitimate path to specialty competence — and the standard way that associate clinicians, including those at our practice, develop scope in any specialty area. Michelle Cortez, AMFT #146795, is currently building her sex therapy practice under Christina's direct supervision, with a particular focus on ENM, kink, BDSM, and fetish-affirming care. Supervision means weekly case consultation, ongoing skill development under a trained specialist, and continued formal training — it's how the specialty gets transmitted to the next generation of clinicians.

Why it matters: most therapy graduate programs cover sexuality in roughly one elective course, if that. Without specific training or specialist supervision, a generally competent therapist can still inadvertently transmit shame, miss medical contributors that need referral, pathologize healthy variations, or default to a single sexual response model that doesn't fit the client. Structured training — through certification, supervision, or both — is the difference between sex therapy and well-meaning conversation about sex.

Online sex therapy in California

Sex therapy translates well to telehealth. Outcome research on online psychotherapy generally shows comparable results to in-person delivery for most outpatient mental health work, and sex therapy specifically tends to translate well because the work is conversational and educational, not physical to begin with.

Some clients find online sex therapy easier than in-person, for reasons specific to the topic. Talking about sex from your own home, in clothes you've chosen, with the camera angled however you want, removes a layer of self-consciousness that an unfamiliar office can amplify. The same applies for couples sessions — being on the same couch in your own space, rather than facing each other across a therapist's office, often allows for more honest conversation.

What we do use: HIPAA-compliant video platforms (SimplePractice or equivalent), end-to-end secure messaging for between-session questions, and structured between-session practices designed for at-home use.

What still needs in-person care: pelvic floor physical therapy for sexual pain conditions (always in-person), urological or gynecological evaluation for medical contributors, and certain trauma-related work where in-person presence is clinically preferred. We coordinate referrals when these come up.

When sex therapy isn't enough — and what we coordinate with

Sex therapy is a powerful tool, and it isn't a substitute for medical care. Several common sex therapy concerns require coordination with non-therapy providers, and we'll always be explicit about when an outside provider is needed.

Sexual pain typically benefits from a pelvic floor physical therapist alongside sex therapy. Conditions like vaginismus, vulvodynia, and provoked vestibulodynia involve real physical tension and often anatomical and dermatological factors that PT and gynecology address directly.

Erectile dysfunction and other male sexual concerns typically warrant a urology consult to rule out cardiovascular, hormonal, or medication-related contributors. Sex therapy addresses the psychological layer, but if there's a medical layer underneath, addressing that often substantially changes what therapy can accomplish.

Hormonal changes (perimenopause, menopause, postpartum, gender-affirming hormone therapy) often have sexual implications that benefit from working with a knowledgeable OBGYN or endocrinologist alongside therapy.

Compulsive or out-of-control sexual behavior sometimes benefits from coordinated care with a psychiatrist, addiction specialist, or specialty IOP, depending on the formulation.

Severe trauma history that's actively destabilizing may need stabilization-focused trauma work (often EMDR or somatic experiencing) before deeper sex therapy is the right next step.

Coordinating care isn't a failure of sex therapy; it's competent practice. The right combination is usually faster and more effective than trying to make any single provider responsible for everything.

Wondering if this is the work you need?

Free 15-minute call. We'll figure out together if we're the right starting point.

Book a Free Consult

FAQ

Common questions about sex therapy.

Is sex therapy physical or hands-on?

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No. Sex therapy is always talk therapy. No physical contact, no nudity, no demonstration. If a concern needs physical evaluation or pelvic floor work, we'll refer to a medical specialist and coordinate alongside.

Do I have to talk about my sex life in graphic detail?

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No. Sex therapy uses clinical language, not erotica, and the level of specificity stays at whatever helps the work. You can also tell us at any point that something is too much to talk about yet, and we'll find another way in.

Can I come alone, or do I need a partner?

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Individual sex therapy is common and effective. Many clients do substantial work on their own sexuality, desire, or sexual history without a partner in the room. If you're partnered, we can add couple sessions later if it makes sense.

Do you work with kink, BDSM, or non-monogamy?

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Yes — kink-affirming, BDSM-aware, fetish-affirming, and non-monogamy-aware practice. We don't pathologize; we work with the structure you're practicing, including ethical non-monogamy, polyamory, and relationship anarchy. Michelle Cortez, AMFT #146795 (supervised by Christina Mathieson, LMFT #115093), is the clinician on our team who specifically focuses on ENM, kink, BDSM, and fetish-affirming care for individuals and couples.

What's the difference between sex therapy and a sex coach?

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Sex therapy is licensed psychotherapy delivered by a clinician trained in mental health and bound by professional ethics, scope of practice, and confidentiality. Sex coaching is unlicensed and unregulated; the coach may have any background or none. Most concerns that bring people to look for a sex coach actually benefit from licensed therapy because they have psychological, relational, or trauma layers underneath. We're a therapy practice, not a coaching practice.

What if my issue feels medical — pain, erectile concerns, etc.?

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We'll ask early on. For concerns that may have a medical component, we coordinate with your physician or specialist (urology, gynecology, pelvic floor PT) so you're not stuck choosing between approaches. Sex therapy and medical care often work better in parallel than separately.

Can sex therapy help low desire from medication (SSRIs, birth control)?

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Often yes, in coordination with your prescriber. Many medications affect libido, arousal, or orgasm — SSRIs, hormonal contraceptives, blood pressure meds, and others. Sex therapy can help you navigate the side effects, communicate with your prescriber about whether a medication change is appropriate, and address the psychological and relational layers that side effects can amplify.

Is sex therapy good for survivors of sexual trauma?

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Yes — and we typically integrate it with trauma-focused work. Sexual trauma often shapes current intimacy in ways that general talk therapy doesn't fully reach. We pair sex therapy with EMDR or somatic approaches when relevant, and pace the work to your nervous system rather than pushing on a timeline.

Will you tell me what's 'normal'?

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We'll tell you what's clinically common and what falls within the range of healthy human variation, which is wider than most people have been taught. We won't tell you that your specific sexuality, desire pattern, or attraction is broken because it doesn't match a particular norm. That framing is what we're working against, not toward.

What's responsive desire vs spontaneous desire?

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Spontaneous desire arises on its own, before any sexual cue — you wake up wanting sex. Responsive desire arises in response to a sexual cue — you weren't thinking about it, you become receptive, your body responds, and desire emerges. Both are healthy patterns. Many people, particularly in long-term partnerships, have responsive desire and have been told this is a problem because they don't experience spontaneous desire. It isn't. The clinical work is recognizing your pattern and working with it rather than against it.

Is there homework between sessions?

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Often yes. Sex therapy benefits from structured between-session practices — sensate focus, mindfulness exercises, communication scripts, specific behavioral approaches for the concern at hand. We design these collaboratively with you, and they're always optional. The work happens in session, but the changes happen between sessions.

How long does sex therapy take?

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Most clients see meaningful shifts within 4–8 sessions for focused concerns (mismatched desire, performance anxiety, communication around sex). Complex concerns — sexual pain conditions, post-trauma intimacy, long-standing relational dynamics around sex — typically take longer. We give a realistic estimate after the assessment phase.

Is online sex therapy as effective as in-person?

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Yes, for the work we do. Sex therapy is conversational and educational, which translates well to telehealth. Many clients actually find online sex therapy easier — talking about sex from your own space removes a layer of self-consciousness that an unfamiliar office can amplify. Pelvic floor PT and medical evaluations still happen in person where appropriate, but the sex therapy proper works well online.

Is sex therapy covered by insurance?

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Sometimes. Sex therapy is typically billed under standard mental health benefits using the same CPT codes as other psychotherapy. We're in-network with Lyra; for other insurance, Mentaya helps you use out-of-network benefits. Insurance claims show the procedure code, not 'sex therapy' specifically.

Free monthly workshop

It's Not Just the Fight: How Trauma Shows Up in Your Relationship

Thursday, April 30, 2026 · 6:00 PM PT · Zoom · Free

See workshops

Ready to talk it through?

Free 15-minute call. We'll figure out if sex therapy is the right work for where you are, and match you with the right person on our team.

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