Keeping Desire & Passion Alive

Why Does Passion Fade in Long Relationships?

The gap between the intense desire of a relationship's early days and the calmer desire of later years is a well-known subject in sex research. A 2019 study by Muise and colleagues starts from exactly this observation: in the early stages of a relationship, sexual desire is often intense, but as partners get to know each other, desire tends to decline. So what you are going through is not a personal failure; it is a phase many long relationships pass through.

The early pull is fed largely by novelty and uncertainty: you do not quite know the other person yet, and every meeting is a small discovery. Over time this gives way to trust, familiarity and a shared daily life. That is a good sign of a maturing relationship, but the same familiarity can quietly dampen passion when curiosity is not fed. Add work pressure, household load, childcare and evenings spent in front of screens, and sex can drop to the bottom of the to-do list.

It helps to separate two situations here. Desire becoming calmer than it used to be is an ordinary part of long relationships. Sex stopping entirely for months, and this upsetting one of you, is a different picture that deserves its own attention. In that case, our guide to the sexless relationship and the sexless marriage programme, which aims to rebuild closeness step by step, may be a closer starting point.

How Common Is Fading Passion?

A large, representative population survey gives a good sense of this. In Natsal-3 (Mitchell and colleagues, published in The Lancet in 2013), which interviewed 15,162 people aged 16 to 74 in England, Scotland and Wales between 2010 and 2012, 23.4% of men and 27.4% of women who had been in a sexual relationship for the past year reported an imbalance in the level of interest in sex between themselves and their partner.

The same survey shows another important detail: among people who had had sex in the past year, 41.6% of men and 51.2% of women reported at least one problem with sexual response, yet only 9.9% and 10.9% said they were distressed about their sex lives. In other words, dips in desire and differences in interest are common, but not every dip is a problem. What matters is how much the change is weighing on you and your relationship.

Does Desire Arrive Spontaneously or in Response?

Most people carry a picture of desire familiar from films: it appears out of nowhere, and closeness follows. In long relationships, though, desire often works in a different order. In a 2000 paper, Basson of the University of British Columbia proposed a model of women's sexual response in long-term relationships that gives more weight to the responsive component of desire. One of the stated aims was to avoid labelling a response as a dysfunction when it is simply different from the traditional cycle.

Seen this way, there are two patterns. In spontaneous desire, the order is desire first, then contact. In responsive desire, the order is reversed: desire appears after closeness has begun in a setting where you feel relaxed, safe and under no pressure. If spontaneous desire has become rarer in your long relationship, it may not mean desire has gone; it may simply have stopped knocking on its own and be waiting for an invitation.

This distinction can also help you rethink the idea that "It doesn't come from inside, so something must be wrong with me". Brotto's 2010 review points out that in women, sexual activity often begins without desire being felt first, and that unprompted sexual fantasies are relatively infrequent; for this reason it argues that diagnostic criteria should reflect women's experience more accurately. So spontaneous desire becoming rarer does not, on its own, mean a dysfunction. If the two of you differ markedly in how often or how desire arrives, our guide to desire discrepancy looks in detail at how to talk about that gap without blame.

What Is the Balance of Security and Curiosity?

Desire often thrives somewhere between two needs: security (closeness, commitment, predictability) and curiosity (novelty, discovery, a little of the unknown). Too much familiarity can dull curiosity; too much distance erodes security. These two needs are not enemies. A safe, steady bond can also be the ground that makes trying new things easier.

Healthy passion grows where you can stay both close to and still discoverable by your partner.

Being able to see each other as separate, interesting individuals feeds desire. Watching your partner do something skilfully, make their friends laugh or talk about something they love, you may see them again, briefly, as someone you do not fully know. Such moments are not planned, but keeping up your own interests and looking at each other's worlds with curiosity can make them more likely.

How Do Shared New Experiences Affect Desire?

The three-study project by Muise and colleagues, published in the Journal of Personality and Social Psychology in 2019, examined couples using daily diaries, longitudinal follow-up and experiments. Taking part in novel, self-expanding activities with a partner was associated with higher sexual desire, and desire raised this way was in turn linked to greater relationship satisfaction. The researchers also reported that the effect could not be explained solely by a better mood, more time spent together or closeness during the activity.

In the same research, desire fuelled this way was also associated with couples being more likely to have sex and feeling more satisfied when they did. What matters is not the size of the activity but that it is genuinely new for both of you: a walk somewhere you have never been, a skill you learn together, a plan that breaks the usual evening routine. Stepping outside the familiar together makes room to see each other in a different light.

Why Does Talking About Sex Matter?

In long relationships many couples feel they know each other so well that talking about sex seems unnecessary, even embarrassing. Research points the other way. Mallory's 2022 meta-analysis brought together 93 studies covering 38,499 people in a current relationship and found that sexual communication was positively associated with both relationship satisfaction and sexual satisfaction. A notable finding: the quality of communication was more strongly linked to satisfaction than its frequency. This is an association, not proof of cause and effect, but the direction is clear.

Natsal-3 points the same way: not being able to talk easily about sex with a partner was among the factors associated with low sexual function. So the point is not to talk about it often, but to feel safe, unjudged and heard when you do. If you are not sure where to begin, our guide on how to talk about sex with your partner can help with the first sentences.

How Do Stress, Fatigue and Parenthood Affect Passion?

Desire mirrors not only the relationship but daily life as well. The NHS lists relationship problems, stress, anxiety or depression, and pregnancy and having a baby among the main causes of a low sex drive, noting that hormone levels change in pregnancy and that looking after a baby can be stressful and tiring. Lower hormone levels with age, particularly during the menopause, certain medicines, hormonal contraception, drinking too much alcohol and some long-term conditions appear on the same list.

In families with young children the picture is often sharper. Lack of sleep, endless caring tasks and an uneven share of the household load can leave the lower-desire partner with no sexual problem at all, simply exhausted. In this period, rather than pushing passion to be "like before", it is more realistic to share the load again, create short, pressure-free moments of closeness and adjust expectations to the reality of the stage you are in. We look at how relationships change after children in our guide to the relationship after a baby.

There is a fine line here: stress and tiredness can pass, but a low mood that lasts for months, a lack of interest that spreads into every area of life, or desire that never returns after giving birth may need a different kind of assessment. We come back to this below, in the section on getting support.

What Helps Keep Desire Alive?

Translating the findings above into daily life, a few common themes stand out that can help nurture desire in a long relationship:

• Creating novelty: New experiences, shared discovery, breaking routine.
• Intentional time: Making uninterrupted, pressure-free space for desire.
• Feeding the erotic: Bringing flirtation, touch and playfulness back into daily life.
• Protecting non-sexual touch: Remembering that a hug or holding hands is worth having without leading anywhere.
• Open communication: Being able to talk about desires, fantasies and boundaries without judgement.
• Staying an individual: Keeping your own interests; curiosity is fed from here too.

What Steps Can You Try Together?

1. Plan something new together

   Once a month, choose an activity neither of you has done before. It need not be big; what matters is that it is genuinely new for both of you and shared.

2. Release sex from the "it should be spontaneous" pressure

   Responsive desire depends on how things begin. Making intentional time for closeness does not spoil the romance; uninterrupted, pressure-free time prepares the ground in which desire can appear.

3. Stop tying touch to an outcome

   When a hug is not expected to lead to sex, touch becomes safe again. Once the expected outcome is removed, closeness can be enjoyable in its own right.

4. Create small moments of flirtation during the day

   A message, a touch in passing, a sincere compliment. Desire usually arrives not suddenly but fed by small signals through the day.

5. Ask each other about your desires with curiosity

   People change over the years. Asking rather than guessing keeps curiosity alive: talk about what makes you feel close, what no longer feels as good as it did, and what you are curious to try.

6. Share the load again

   Tiredness is one of desire's quietest rivals. Looking together at how housework, childcare and mental load are shared may need to come before any conversation about sex.

What these steps share is that they create conditions for desire rather than waiting for it. For many couples, that is the more realistic route.

When Should You Get Support?

Desire rising and falling over a long relationship is ordinary, and it often finds room again through small changes. In these situations, though, it is better to talk to a professional:

• The drop in your desire is worrying or clearly upsetting you or your partner; the NHS advises seeing a GP if you're worried about a low sex drive and sets no time limit for it.
• Desire has changed sharply over a short period; a medicine, hormonal contraception or a health condition may be playing a part.
• Months after giving birth, your desire has not come back.
• There is pain during closeness, or physical difficulties such as problems with erection or lubrication.
• The lack of desire comes with a long-lasting low mood, sleep problems or intense anxiety.
• Every time the subject comes up it turns into a serious row, or you both avoid talking about it altogether.

For physical causes, the first port of call is a GP, a gynaecologist or a urologist; if there are options involving medicines or hormones, discuss them with a doctor. For the relationship and communication side, a clinical psychologist, a couples therapist or a specialist in sexual health can help. One point applies in every case: if there is fear, pressure, control or coercion in your relationship, your safety comes before passion. No one owes anyone sex, and closeness is not built where there is no consent.