Sexual Compatibility: How Much Does It Matter?

Entry No. 168 ·

At a sunlit kitchen table on a lazy weekend morning, a woman of about twenty-seven in a plain oatmeal jumper and a man of about twenty-eight in a plain navy jumper sit close together over coffee and toast, laughing at something she has just said, his hand resting lightly over hers; a deep rose pink mug sits between them, the kitchen is lived-in and cosy with plants on the windowsill, both fully dressed in plain clothes with no lettering or logos, phones face down and out of view. The mood is warm, affectionate and quietly hopeful.

By The IF Team

Sexual compatibility matters, but less as a fixed match than as something two people work out together. It means your desires, expectations and ways of showing affection fit well enough that you both feel wanted, comfortable and able to be honest. Research suggests it is mostly built rather than found: people who talk openly with a partner about intimacy tend to report a better sex life, people who believe a good one takes effort fare better than those who think it comes down to luck, and differences in desire turn up in almost every long relationship. A mismatch is rarely a verdict on you. How you handle it usually matters more.

Like every kind of compatibility, it can only really be discovered once two people are both single and getting to know each other, and attraction rarely waits for that. IF exists so that people can be honest about who they have feelings for, whatever their relationship status and whoever it is: you put a feeling that started in real life into an IF, and it waits, sealed, for a better moment. The end of this guide explains how. First, what compatibility in this part of a relationship actually involves.

What sexual compatibility actually means

Physical desire is one strand of the psychology of attraction, and when people say they are or are not sexually compatible, they usually mean some mix of these:

  • Desire: how often each of you tends to want intimacy, and how that shifts with stress, sleep and busy seasons of life.
  • Affection: how much touch and closeness each of you needs day to day, quite apart from sex.
  • Pace and readiness: how quickly each of you wants physical intimacy to develop, and the confidence that either of you can say “not yet” without it becoming a problem.
  • Meaning and expectations: what intimacy means to each of you, and what you each expect around exclusivity.
  • Communication: whether you can talk about all of this kindly, including when you want different things.

Only one of those is about frequency. Most of sexual compatibility is about whether two people can be honest with each other, which is good news, because honesty can be learned in a way that chemistry cannot.

Built, not found

Psychologists have studied two common beliefs about how a satisfying sex life is kept going. People with “growth” beliefs see it as something couples work at and adapt over time. People with “destiny” beliefs see it as a matter of finding the right partner: either you are compatible or you are not. Across six studies, people who held growth beliefs reported happier relationships and more satisfying sex lives, and so did their partners. Destiny beliefs caused trouble in a specific situation: when couples disagreed about sex, people who believed in destiny felt worse about the whole relationship.

That makes sense. In the heady early months, almost everyone feels compatible, and the honeymoon phase can make it seem effortless. The beliefs start to matter later, when the first difference appears. If you think compatibility is fixed, a difference looks like proof you chose wrongly. If you think it is built, the same difference is simply the next thing to talk about.

Mismatched desire is normal

In almost every relationship, one person wants intimacy more often than the other at least some of the time. Desire rises and falls with stress, health, workload, sleep and big life changes, and the two of you are unlikely to rise and fall in step. A difference is not a sign that something is broken.

How you see the gap may matter more than the gap itself. In a study of couples in long-term relationships, partners who perceived a larger difference in desire reported lower sexual satisfaction, while the difference actually measured between them did not predict it. The story a couple tells about a mismatch can shape how it feels as much as the mismatch does.

A few things tend to help:

  • Stop keeping score. Tallies of who asked and who said no turn intimacy into a negotiation.
  • Let affection be affection. A hug that is only a hug, with no expectation attached, makes closeness feel safe again for both of you.
  • Protect time together. Desire tends to need some unhurried, undistracted time to show up in.
  • Keep consent ongoing. “Not tonight” is always a complete answer, and it should never become a debt.

How often is normal?

There is no correct number, and comparing yourself with what you imagine other couples do is a reliable way to feel worse. One large piece of research, across three studies of more than 30,000 people, found that for people in relationships, wellbeing rose with sexual frequency up to about once a week and then levelled off: more often than that was not linked to being any happier. The researchers could not say which way the link ran, and happier couples may simply have more sex.

Treat that as permission rather than a target. What matters is whether the two of you feel close and wanted, and whether either of you is quietly unhappy, not whether you match a figure in a study.

How to talk about it

Talking is the single most useful skill here. A review of 48 studies found that people who communicate more openly with a partner about sex tend to report a better sex life on every measure the researchers looked at, though, as the authors note, the studies show a link rather than proof of cause. If talking about it feels awkward, a little structure helps:

  1. Pick a neutral moment — a walk, a slow breakfast — not the middle of intimacy, and not straight after one of you has said no.
  2. Start with appreciation: what you love about being close to them.
  3. Speak for yourself. “I’d love it if we…” lands far better than “You never…”.
  4. Ask, then listen. “What do you enjoy? Is there anything you’d like more or less of?”
  5. Agree that “not yet” and “not tonight” are always fine answers.
  6. Come back to it. One good conversation is a beginning, not a settlement.

If you are not sure how to open it, try something like: “I really love how close we are. Can I tell you something I’ve been thinking about?” Or, when life has got busy: “We’ve both been exhausted lately and things have gone quiet. I miss you. Can we talk about it?”

Before you have been intimate

You cannot know in advance, and you do not need to rush to find out. People are ready at very different times, and waiting until you both want to is never a mistake; when to sleep together covers that decision. What you can learn early is just as telling: how someone talks about affection, whether they respect a “not yet” without sulking, and whether you feel comfortable raising expectations such as exclusivity.

Interest in sex also varies widely from person to person. Some people experience little or no sexual attraction at all, and many of them have loving relationships. For them, as for everyone, compatibility is about wanting compatible things and saying so honestly.

When a difference is a dealbreaker

Some differences are about frequency or taste and can be worked with. Others are about what you each want the relationship to be — one of you wants monogamy and the other an open relationship, say — and those deserve to be treated as the big decisions they are. It is also fair to step back when one of you needs something the other cannot give without resentment, and talking has stopped changing anything. Ending a relationship over this is not shallow; closeness is part of what makes a romantic relationship romantic.

If a difference keeps causing hurt and you both want to stay, this is one of the areas where a couples or sex therapist can genuinely help, because outside, trained guidance tends to make these conversations easier than they are alone. Sexual compatibility is one part of a bigger picture, too, and chemistry versus compatibility looks at how the pieces fit together.

Where IF fits: compatibility needs the right time

Every kind of compatibility is discovered the same way: by two people getting to know each other at their own pace, once nothing stands in the way. On IF, that means two singles, and an honestly open relationship counts as single: if your partner knows and has agreed, IF recommends listing yourself that way, and inside the terms you both set you can Like, match and chat. If you have feelings for someone who is in a monogamous relationship, or you are in one, the feeling is honest and nothing to be ashamed of. Acting on it while either of you is committed to someone else is another matter: that would be cheating, and lying about it would make it worse. IF keeps everything shut as long as one of you is marked as in a relationship: no chat opens, and no conversation can start.

What you can do is say how you feel. An IF is sealed and holds up to 250 characters. You can reach someone through Swipe, or look them up in Search by a phone number, email or handle that they gave you. They might hear that something is waiting for them; the sender and the message stay hidden until a reveal. If they have no IF account, an email address prompts a single brief invitation, and a phone number or handle prompts nothing whatsoever. Only when you are both single can the IF be revealed. If they say yes, you find out about compatibility the way it should be found out: together, at a pace that suits you both.

Already both single, and they are on IF? Then send a Like; if they accept it, a chat opens. Your first IF is free.

Questions people ask

Can sexual incompatibility be fixed?

Often, yes, when it is about frequency, pace or communication and both people want to work on it. Honest conversation, less pressure and more unhurried time together resolve a great deal. It is harder when the difference is about what you each want the relationship to be, and it is fine to decide that a gap is too wide.

How do you know if you are sexually compatible before sleeping together?

You cannot know for certain, but you can learn a lot. Notice how comfortable you are with their affection, how they respond to your boundaries, and whether you can talk about expectations without embarrassment turning into silence. Someone who listens well before you are intimate is likely to listen well afterwards.

Is it normal for desire to change in a long relationship?

Completely. The intensity of the early months usually settles, and desire responds to stress, health and what else is going on in your lives. Change is not a sign the relationship is failing; it is a sign it is real. What helps is noticing it together rather than silently.

Is sexual compatibility more important than emotional compatibility?

For most couples the two are tangled together: feeling understood and appreciated tends to make intimacy easier, and a good physical connection tends to make you feel closer. If you had to choose, emotional compatibility is the harder thing to build from nothing, but neither should be dismissed.

Closeness is built by two people who can be honest with each other. If the person you have feelings for is not single yet, tell them in an IF, and let the rest wait for its time.