Based on sex educator Tracey Cox's conversation on The Diary of a CEO with Steven Bartlett. Cox has written seventeen books on sex; this pulls out the practical core — the handful of things that reliably separate couples who keep a great sex life from couples who quietly lose one.

Most couples treat sex like weather — something that happens to them, good early on, mysteriously worse later, and largely out of their hands. Tracey Cox has written seventeen books arguing the opposite. Sex, she says on The Diary of a CEO, is a skill, and like any skill it responds to attention and effort and decays without them. The couples who keep a great sex life going for decades aren't luckier or more compatible. They just understand a few things the rest of us were never taught. Here they are.

Stop waiting for desire — learn to build it

The most useful idea in the whole conversation is the difference between two kinds of desire. Spontaneous desire is the out-of-nowhere kind — you see something, you want sex, you're off. Roughly two-thirds of men run on it, and almost everyone has it at the start of a relationship, when the hormones are doing the work for you. Responsive desire is different: the wanting only shows up after something sexual has already started. You might feel nothing beforehand, agree to give it a go, and then — if the stimulation is good — find yourself genuinely into it. A large share of women run mostly on responsive desire.

Here's why that matters. In a new relationship, spontaneous desire papers over everything. A year or two in, it fades — for everyone — and desire "stops tapping you on the shoulder." People read that silence catastrophically: my sex drive is gone, something's wrong with me, maybe I'm with the wrong person. Usually nothing is wrong. The drive is still there; it just won't arrive on its own anymore. It has to be created — warmed up, invited, built — rather than waited for. Couples who know this stop treating a quiet libido as a verdict and start treating it as a cue to begin.

Close the orgasm gap

Now the mechanical truth most couples never say out loud: for about 80% of women, penetrative sex alone does not reliably produce orgasm. The clitoris — most of which sits outside the vagina — is the organ that does, and intercourse simply doesn't give it enough attention. This has been known, Cox notes drily, since the Kama Sutra. Yet most couples run the same intercourse-centric routine every time, which means a lot of women are having sex that isn't especially exciting and doesn't finish the job — and then quietly faking it, because the last person faked it, because every movie sold them the simultaneous-orgasm myth.

The fix is not complicated. Take intercourse off its pedestal as "the main event" and treat it as one part of a bigger menu. Prioritize the things that actually work — oral, hands, a vibrator — and let her orgasm happen through those, before or instead of intercourse. Cox's blunt mantra: she comes first. And no, using a vibrator is not cheating and doesn't take anything away from the couple — most women can climax within a few minutes with one, reliably, every time. If you've had all the intimacy and it just hasn't tipped over, reaching into the bedside drawer is the easiest solution in the world. We resist it out of a strange pride; the couples having great sex don't.

Have the three-minute conversation

Every sex problem, Cox insists, is solvable if you talk about it — and almost none get solved because people won't. The reason is always the same fear: I'll hurt them, I'll embarrass them. So the tiniest issue goes unspoken and slowly poisons everything.

Two things make the conversation survivable. First, frame it positively and specifically. Not "you finish too fast and I'm left hanging," but "I love our sex, and I especially love it when you do X — can we do more of that?" Men in particular, she notes, respond far better to specific, positive instruction than to vague criticism. Describe your idea of a perfect session rather than critiquing the last one. Second, know that the awkwardness is short. With couples who haven't discussed sex in thirty years, the first conversation is excruciating — for about three minutes. Then the relief pours out, and nobody ever regrets having done it. Keep the genuinely charged conversations outside the bedroom, over a glass of wine, not mid-act — and during sex, steer with positive cues ("stay right there, that's perfect") rather than barking corrections, which kill the mood and, often, the erection. Positive framing is the whole game.

Kill the routine — and keep some distance

Novelty is oxygen, especially for women, for whom monotony is the fastest desire-killer. The enemy isn't your partner; it's sameness — the same sex, the same way, on the same nights. And the antidote is broader than the bedroom: you cannot have an interesting sex life while living a boring one. Doing the same thing every day produces the same tired sex.

Cox's most underrated idea here is otherness. Close couples collapse into a single unit — Tweedledum and Tweedledee — who only ever see each other coming through the front door, where they become completely, unarousingly safe. You need separateness: your own identity, your own pursuits, and crucially, the chance to see your partner out in the world — at work, in a room full of other people, being found interesting by someone else. She describes catching sight of her husband across a restaurant before he'd seen her, noticing other women notice him, and feeling the pull sharpen. Watching your partner do something they love and are good at is, she says, one of the most attractive sights there is. Give each other room to be desirable to other people, and you become more desirable to each other.

Keep choosing each other

Cox is unfashionably firm on this: within a monogamous commitment, you have an obligation to keep showing up — to stay as attractive as you reasonably can, physically and intellectually, and to not curdle into the bitter, negative version of yourself. "There is nothing less sexy than being with somebody who's miserable all the time." This isn't about facelifts; it's about effort and engagement. And she pushes back hard on the comfortable line "my partner would never cheat on me" — not because everyone cheats, but because taking a partner's desire for granted is itself the risk. Feeling desired — your partner looking at you like they still want you — is, for many people, the single biggest turn-on there is. It's worth continuing to earn.

Confidence comes from the bed, not the mirror

Body image quietly wrecks more sex lives than almost anything — twenty years of studies link it to every dimension of sex, from arousal to orgasm — because if you don't like your body, you don't want it looked at or touched. But the fix runs backwards from what you'd expect. It isn't the gym or a new haircut (though exercise genuinely helps desire). It's having more sex, not less: when your partner clearly enjoys you, your brain slowly concludes I can't be as undesirable as I thought. Confidence comes from the evidence of doing the thing. In the moment, if you're spiraling about how you look, Cox's advice is to either go inward — close your eyes, focus on what you feel rather than how you appear — or go outward — get active, make eye contact, participate hard enough that there's no spare attention left for self-criticism.

And initiate. Never initiating quietly tells your partner you don't actually want them — you're just complying. Taking a turn as the one who wants it, obviously and unmistakably (subtle signals get missed), rebalances the whole dynamic and makes you feel powerful. Swapping who leads, she says, is one of the simplest routes to a more interesting sex life.

Right-size your expectations

Finally, a dose of realism that paradoxically protects your sex life. That incandescent early sex is chemically fueled, and those chemicals fade in every relationship by roughly the two-year mark — for everyone, with everyone. You can absolutely have great, exciting, satisfying sex after that, but you can't recreate the specific hormonal high of the beginning by trading your partner in; you'll just reset the same clock with someone new. Knowing this stops people from torching perfectly good relationships in search of a feeling that was always temporary.

Two more guardrails. Don't take your template from porn, which has drifted somewhere ugly and bears little resemblance to real sex — calibrate to a fiction and you'll be perpetually disappointed by reality. And if you're choosing a long-term partner, actually match on sex drive: libido is artificially inflated at the start, so wait until you're a year in to see the real thing before you commit. A big, permanent mismatch is genuinely hard.

One last liberating point: sexless doesn't automatically mean unhappy. Plenty of couples with two naturally low drives are perfectly content, and a striking share of people who rarely have sex still rate their relationships as extremely happy — because when the love is strong, most of us will choose love over sex. What doesn't work is one person wanting far more than the other and nobody talking about it. The one non-negotiable in everything Cox says isn't a technique. It's the conversation. Don't let it slide, and don't let it go unspoken — because the couples who keep talking are the couples who keep having great sex.

Long talk short: Great sex in a long relationship isn't a talent you were born with or a spark you either have or don't. It's a skill, and it rewards the same thing every other skill does — attention, honesty, and a little effort. Understand that desire has to be built rather than waited for, make the sex actually work for both people, and be willing to have one awkward three-minute conversation. Do those, and 'every time' stops being a fantasy.

Further reading

• Great Sex Starts at 50 — Tracey Cox
• Come As You Are — Emily Nagoski
• Mating in Captivity — Esther Perel

Affiliate links — a small commission supports the blog at no cost to you.