Physical and emotional connection are important parts of human life, but the science is more nuanced than saying that people need sex or physical affection in order to live longer.
The strongest evidence concerns social connection and isolation generally, rather than sexual activity specifically. Large observational studies and meta-analyses have found that people with stronger social relationships tend to have lower mortality risk, while loneliness and social isolation are associated with higher risk. However, these studies generally cannot prove that lack of connection directly causes earlier death; health, behavior, socioeconomic circumstances, and other factors can influence both relationships and health. (PubMed)
So the most evidence-based statement is:
Connection appears to be associated with better health and longevity, but sex itself has not been established as a requirement for a long life.
What happens when affection disappears over many years?
In a long relationship, affection can gradually decrease. Kissing, cuddling, holding hands, sexual contact, compliments, and spontaneous expressions of desire may become less frequent.
People can adapt to this.
Someone may become less likely to expect affection or may become more emotionally self-sufficient. That doesn’t necessarily mean they no longer want intimacy. It may simply mean they have adjusted to the circumstances they are living in.
There is also evidence that affectionate touch can influence emotional and physiological responses. Research reviews suggest that pleasant touch may help regulate stress and contribute to psychological and relationship well-being. (PubMed)
However, it would be an overstatement to say that years without touch inevitably damage the body or brain. People differ considerably, and some people are perfectly content with relatively little physical affection.
What about sexual desire?
Sexual desire is particularly complicated.
It can be influenced by age, hormones, medications, sleep, stress, physical health, relationship satisfaction, emotional safety, attraction, past experiences, and many other factors.
Therefore, someone who has little sexual desire after years without intimacy hasn’t necessarily “lost” their sexuality. Conversely, someone who suddenly experiences strong desire again hasn’t necessarily discovered that their previous relationship was the sole cause of their lack of desire.
Context matters.
There is some evidence that sexual functioning and sexual activity are associated with health outcomes, but much of this research is observational. For example, a longitudinal study of adults over 50 found associations between declining sexual desire/function and subsequent health outcomes in some groups, but that does not establish that reduced sexual activity caused the health problems. (PubMed)
What happens when affection returns?
When someone who has experienced little affection begins receiving affectionate touch again, they may experience noticeable changes in how they feel.
They might feel:
● happier
● calmer
● more connected
● more comfortable with physical closeness
● more interested in intimacy
● more emotionally open
● more aware of their own desire
Research on affectionate touch supports some of this. For example, one study found that affectionate touch was associated with lower self-reported anxiety, stress, and burden and with higher oxytocin levels. But this type of research does not mean that every hug or sexual encounter produces a predictable hormonal or health transformation. (PubMed)
Oxytocin is also often described too simplistically as the “love hormone.” It is involved in social bonding and other processes, but its effects depend on the person, situation, and type of interaction. Researchers continue to investigate exactly how oxytocin and other biological systems contribute to human relationships. (PubMed)
Men and women
There is substantial overlap between men and women in their need for affection, closeness, and meaningful relationships.
Men can deeply value being held, kissed, appreciated, desired, and emotionally understood.
Women can also deeply value sexual desire, physical attraction, tenderness, and being wanted.
It is therefore misleading to reduce relationships to:
“Men need sex; women need affection.”
Both sexes can want both.
There may be some average sex differences in responses to pleasant touch. One meta-analysis found that women, on average, rated certain forms of affective touch as more pleasant than men did, but the authors also emphasized that the evidence base was relatively small. Such averages tell us very little about what any particular man or woman will experience. (PubMed)
What can happen after a long period without intimacy?
Sometimes a person who has lived for years with little affection meets someone with whom they experience strong emotional or physical chemistry.
The contrast can be powerful.
They may think:
“I didn’t realize how much I missed this.”
They may feel more attractive, energized, playful, affectionate, or sexually interested.
Those experiences are real, but they should not automatically be interpreted as proof that the new relationship is healthier or that the previous relationship was entirely responsible for their earlier lack of desire.
New relationships can involve novelty, attraction, attention, emotional validation, and excitement—all of which can influence how someone feels.
At the same time, the experience can provide useful information about what that person values and what kinds of connection make them feel fulfilled.
The emotional significance of being desired
One aspect of intimacy that is difficult to reduce to biology is the psychological meaning of being wanted.
There is a meaningful difference between:
“My partner has sex with me.”
and:
“My partner genuinely desires me.”
For some people, the latter communicates acceptance, attractiveness, belonging, and emotional importance.
Similarly, there is a difference between receiving a hug as a routine gesture and being held by someone who genuinely wants to be close.
These experiences don’t have identical meanings for everyone, but they can be deeply significant within a loving relationship.
When affection disappears in a long marriage
A long marriage can gradually become centered on companionship, family responsibilities, finances, household management, and shared history.
That doesn’t necessarily mean the relationship is unhealthy.
Some couples are genuinely content with little physical intimacy.
Other couples experience the loss of affection as a profound source of loneliness.
The important question isn’t simply:
“How much sex does a couple have?”
It is:
“Do the people in this relationship feel loved, respected, emotionally connected, and satisfied with the kind of intimacy they have?”
There is no universal amount of affection or sexual activity that every couple needs.
And when connection returns
When affection or sexual intimacy returns after a long absence, it can feel transformative.
But the most scientifically responsible interpretation is not necessarily:
“This has biologically restored me.”
It may be:
“This experience is meeting an emotional, relational, or physical need that I had been missing.”
That can be extremely important without requiring us to claim that intimacy has a specific life-extending or medically restorative effect.
And sometimes the experience leads to a deeper realization:
“I had forgotten how important connection was to me.”
The bigger picture
The strongest evidence supports the importance of meaningful social relationships and protection against chronic loneliness and isolation. (PubMed)
There is also growing evidence that affectionate touch can influence stress, emotional well-being, and relationship processes. (PubMed)
The evidence is considerably less definitive when we make a more specific claim that sexual intimacy itself extends lifespan.
So it is reasonable to say:
Connection matters.
Affection can matter.
Touch can matter.
Emotional intimacy can matter.
Sexual intimacy can be deeply meaningful for some people.
But none of these should be turned into a universal biological requirement.
Ultimately, the healthiest relationship is not necessarily the one with the most sex or the most physical affection.
It is one in which the people involved can honestly say:
“I feel seen.
I feel respected.
I feel safe.
I feel valued.
I can give and receive affection in a way that feels right for me.
And I am not having to silence an important part of myself just to remain in this relationship.”
Ultimately, intimacy is not something anyone needs in order to live a long life, but meaningful connection is an important part of well-being. For many people, affection, touch, emotional closeness, and sexual intimacy help them feel loved, valued, desired, and fully connected to another person. When those things have been missing for a long time, experiencing them again can be a powerful reminder of how important connection is—and how much it can contribute to feeling alive, fulfilled, and truly seen.