Why Desire Changes in Long-Term Relationships
In the early months of a relationship, desire often seems effortless. Years later, many couples find sex has become less frequent, more routine, or a source of tension. This is one of the most common reasons people come to see me, and it is rarely a sign that something is broken.
Spontaneous and responsive desire
Some people feel desire out of the blue: a sudden urge, before anything has happened. Others mostly feel it in response to closeness, touch or a sexual situation. Both are normal. Early in a relationship, novelty makes spontaneous desire more common. Over time, many people shift towards responsive desire, and if they are waiting to “feel like it” first, they may wait a long time.
Understanding this can be a relief. It means desire may not have disappeared; it may simply need different conditions to show up.
Brakes and accelerators
A helpful way to think about desire is that we all have accelerators (things that turn us on) and brakes (things that turn us off). In long relationships, the brakes often build up quietly:
- Tiredness, stress and busy schedules
- Young children, caring responsibilities and lack of privacy
- Unresolved arguments or feeling unappreciated
- Sex that has become predictable, pressured or painful
- Body image worries, low mood or anxiety
- Physical factors such as hormonal changes, illness or some medications
Often the answer is not to push harder on the accelerator, but to find and ease the brakes.
When desire differs between partners
Almost every couple has some difference in desire. It becomes painful when it turns into a cycle: one partner initiates and feels rejected; the other feels pressured and starts avoiding affection in case it leads to sex. Both end up feeling lonely.
What helps
- Talking about sex outside the bedroom, with curiosity rather than blame
- Separating affection from the expectation of sex, so touch feels safe again
- Prioritising time together and reducing the practical brakes where you can
- Trying sensate focus: structured touch exercises that take the pressure off performance
- Getting a health check if physical factors could be involved
Psychosexual therapy can help you understand your own pattern of desire, and help couples find a way of being close that works for both of them.
Talk to a doctor-led therapist
If a change in desire is causing worry or distance between you, talking it through with a specialist can help you both understand what is going on. Read more about support for low desire, or book a confidential 30-minute consultation for £60.
Written by Dr Kahverry Rajeswaran MBBS, MRCGP, GMC-registered GP and COSRT-registered psychosexual therapist. Last reviewed: 22 October 2026. This article is general information and does not replace individual medical advice.