Quick answer: The coital alignment technique (CAT) is a modified missionary position where the penetrating partner shifts their body up and forward so the base of the penis or strap-on grinds directly against the clitoris with every movement. Instead of thrusting in and out, both partners rock together in a slow, steady rhythm. Research by Eichel et al. (1988) found that couples using CAT reported significantly higher rates of orgasm during intercourse compared to standard missionary.
If you've ever thought missionary was a bit underwhelming, CAT might change your mind. It looks almost identical from the outside, but the shift in angle and motion makes it a completely different experience. The penetrating partner moves higher up the body so their pelvis sits against the clitoris, and then you both grind rather than thrust. That's it. Small adjustment, big difference.
The reason it works so well comes down to anatomy. Most people with a clitoris need direct clitoral stimulation to orgasm, and standard penetration doesn't provide much of that. CAT fixes the gap without adding hands, toys, or complicated positioning. It's also one of the most intimate positions you can be in, which is why it keeps showing up in conversations about the orgasm gap.
What Actually Happens During CAT
In regular missionary, the penetrating partner's hips sit roughly level with the receiving partner's, and the movement is mostly in-and-out thrusting. CAT changes two things: the angle and the motion.
The penetrating partner shifts their whole body forward and upward, so their chest is closer to the receiving partner's shoulders and their pelvis is higher than it would normally be. This lines up the base of the penis (or strap-on) directly with the clitoris and vulva. Then, instead of thrusting, both partners rock together. The receiving partner pushes their hips up slightly while the penetrating partner rocks down. The movement is more like a wave than a piston.
The result: constant clitoral pressure throughout the entire motion. Penetration is shallower than normal, but the first third of the vagina and the vaginal opening are actually the most sensitive parts internally, so shallower is not a downgrade.
How to Do It: Step by Step
1. Start with foreplay (seriously)
CAT works best when the receiving partner is already aroused. The clitoris becomes engorged with blood flow during arousal, making it more responsive to the grinding pressure. Rushing into position before the body is ready means you miss out on what makes it effective. Take your time. Foreplay matters.
2. Get into missionary
Receiving partner on their back, penetrating partner on top. Nothing unusual yet. The receiving partner can place a pillow under their hips to tilt the pelvis upward slightly, which makes alignment easier and can feel more comfortable.
3. Shift up and forward
This is the key move. The penetrating partner slides their body up so their chest is near the receiving partner's shoulders, not their chest. The hips move up too, so the base of the penis or toy sits against the clitoris. You want full pelvis-to-pelvis contact. Weight should be distributed toward the upper body (elbows, forearms) so you're not crushing your partner.
4. Rock, don't thrust
Replace in-and-out thrusting with a slow back-and-forth rocking motion. The penetrating partner pushes forward and down, the receiving partner pushes up to meet them. Keep the bodies close. The point is constant contact between the pelvis and the clitoris, not deep penetration.
5. Find your rhythm together
CAT is not a solo performance. Both partners need to be moving in sync, and that takes a minute to figure out. Communicate. Slow down. If it feels awkward at first, that's normal. The rhythm clicks once you stop trying to make it feel like regular sex and lean into the grind. Our guide to communication in the bedroom covers how to talk about what's working mid-session.
Why CAT Works (The Science)
The original research on CAT came from psychotherapist Edward Eichel in 1988. His study found that couples using the technique experienced significantly higher rates of female orgasm during intercourse. A follow-up study (Eichel, Eichel & Kule, 1988, published in the Journal of Sex & Marital Therapy) reported that 56% of women who rarely or never orgasmed during missionary achieved orgasm using CAT.
The reason is straightforward: most people with a clitoris orgasm through direct clitoral stimulation, not vaginal penetration alone. A 2017 study in the Journal of Sex & Marital Therapy found that 36.6% of women reported needing clitoral stimulation to orgasm during intercourse, while an additional 36% said clitoral stimulation enhanced their orgasms even when not strictly required (Herbenick et al., 2017).
CAT provides that stimulation passively, through body positioning rather than manual effort. No one needs a free hand. No one needs to reach for a toy (though you can, more on that below). The clitoris gets consistent grinding pressure just from the way you're lying together. For more on why clitoral stimulation matters, check out our clitoris deep-dive.
Making It Feel Better
Add lube
CAT relies on friction between the pelvis and the vulva, and friction without enough moisture can go from good to uncomfortable quickly. A water-based lubricant keeps everything gliding. Apply it to the vulva and the base of the penis or toy before you start. If you're not sure which type suits you, our lube comparison guide breaks down the options.
Use a vibrator
Because your bodies are pressed so close together, a slim toy works best. A bullet vibrator tucked between your bodies adds vibration to the clitoral contact without breaking the closeness. A wearable vibrator like the Luna can stay in place hands-free while you both focus on the rhythm. Or use a pleasure ring like the Orb on the penetrating partner for mutual vibration.
Try a pillow under the hips
A folded pillow under the receiving partner's bum tilts the pelvis upward, changing the angle of contact. This can make it easier for the penetrating partner to line up correctly, and it increases pressure against the clitoris. Experiment with height until you find what feels best.
Slow down even more
The most common mistake with CAT is going too fast. The position is designed for slow, steady pressure. If you speed up, you lose the constant clitoral contact that makes it work. Think of it like mindful sex: the slower you go, the more you feel.
CAT for Different Bodies and Dynamics
CAT works with any combination of genitals as long as one partner is penetrating (penis or strap-on) and the other has a clitoris. It also works regardless of body size. Larger bodies may find it easier to achieve pelvis-to-pelvis contact because there's more surface area for grinding. Smaller bodies might need more pillow adjustment to get the angle right.
For same-sex couples using a strap-on, the mechanics are identical. The harness-wearing partner shifts up and forward in the same way. Some strap-on harnesses have a pocket for a vibrator on the wearer's side, which means both partners get stimulation during the rocking motion. For more on toys for couples, we have a full guide.
Common Mistakes
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Thrusting instead of rocking. The whole point is grinding, not pumping. If you catch yourself thrusting, slow down and shift back to a rocking motion.
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Not shifting high enough. The penetrating partner needs to be noticeably higher than in regular missionary. If the clitoris isn't getting direct contact, scoot further up.
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Expecting it to feel like regular sex. It doesn't, and that's the point. The sensation is more of a slow build than an immediate intensity. Give it time.
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Forgetting to communicate. A small "higher" or "slower" goes a long way. Neither partner should be guessing.
What to Try After CAT
If you enjoy the grinding aspect of CAT, you might also like positions that keep bodies close and emphasise clitoral contact. Sitting positions (partner in a lap, face to face) offer similar friction. Grinding during mutual masturbation is another way to explore what that contact feels like without penetration. And if CAT has you thinking more about clitoral stimulation in general, our guide to self-pleasure covers how to figure out what your body responds to on your own, which makes partnered play better too.
FAQs
What is the coital alignment technique?
A variation on missionary where the penetrating partner shifts up and forward so the base of the penis or strap-on presses against the clitoris. Partners rock and grind together instead of thrusting, providing constant clitoral stimulation during penetration.
Does CAT actually work for orgasm?
For many people, yes. The original 1988 study found significantly higher orgasm rates compared to standard missionary. It works because it provides consistent clitoral stimulation, which is how the majority of people with a clitoris orgasm. It's not guaranteed for everyone, but it's worth trying.
Can you use a strap-on with CAT?
Absolutely. The mechanics are the same. The harness-wearing partner shifts up and forward so the base of the toy grinds against the receiving partner's clitoris. A firm strap-on base makes the grinding motion more effective.
How long does it take to get the hang of it?
Most couples need a few tries to find the right alignment and rhythm. It's not complicated, but it does feel different from regular sex, so give yourselves a couple of sessions before deciding if it works for you. Communication during the act speeds up the learning curve.
What if it feels uncomfortable?
Add lube. Lots of grinding without enough moisture creates friction that's not the fun kind. Also check that the penetrating partner's weight is on their forearms, not pressing down on the receiving partner's body. A pillow under the hips can help with angle. If penetration feels uncomfortable in general, our guide on when sex hurts is worth reading.
Is CAT only for heterosexual couples?
Not at all. Any couple where one partner is penetrating (with a penis or strap-on) and the other has a clitoris can use CAT. The technique is about body positioning, not the type of relationship.
References
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Eichel, E.W., Eichel, J.D., & Kule, S. (1988). The technique of coital alignment and its relation to female orgasmic response and simultaneous orgasm. Journal of Sex & Marital Therapy, 14(2), 129-141.
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Herbenick, D., et al. (2017). Women's experiences with genital touching, sexual pleasure, and orgasm: Results from a U.S. probability sample. Journal of Sex & Marital Therapy, 44(2), 201-212.
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Lloyd, E.A. (2005). The Case of the Female Orgasm: Bias in the Science of Evolution. Harvard University Press.
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