Sex Drive: 5 Surprising Facts from a 67k Person Study
What really drives sexual desire? We often rely on a handful of common assumptions about age, gender, and relationships to answer this question. But what happens when we peel back the layers and look at the science behind sex drive?
A groundbreaking study from the Estonian Biobank provides some of the clearest answers to date, challenging much of our conventional wisdom.
By analyzing data from over 67,000 participants (N = 67,334), researchers uncovered a complex tapestry of unseen forces shaping who wants sex and why. This article shares the most counter-intuitive findings from this massive study that are changing our understanding of human libido.
The Gender Gap in Desire is Wider and More Persistent Than we Thought
The first force this study brings into sharp focus is gender.
While it’s no secret that men, on average, report higher sex drive than women, this research revealed the difference to be exceptionally large and consistent across the lifespan.
In fact, the effect size found was even larger than those documented in previous large-scale meta-analyses. η² = 0.18, a large effect size indicating that gender alone explained a substantial 18% of the difference in desire.
This robust finding underscores just how profound and persistent the influence of gender is on libido. The study’s authors highlight the sheer magnitude of this difference across different life stages:
“Even the peak of average woman’s sexual desire at ages around 20 to 30 remains lower than men’s average levels across much of adulthood. It is only after the age of 60 + that men’s declining sexual desire falls below the highest levels ever reported by women.”
Furthermore, the research showed that this gap in desire actually widens with age, reaching its peak in the 60+ age group.
Men’s Sex Drive Peaks Surprisingly Late
We’re often told that a man’s sex drive is like a rocket. Supposedly peaking in his late teens and slowly coming down.
This study, however, suggests it’s more of a long climb to a high plateau.
Contrary to popular belief, men’s sexual desire actually peaked around their late 30s to early 40s. This finding was particularly surprising because it runs counter to what we know about male biology.
The researchers noted the unexpected nature of this pattern:
“A noteworthy finding was that men’s sexual desire peaked around the age of 40, exceeding even early adulthood levels… This pattern is surprising because it does not align with the well-documented trajectory of testosterone decline…”
This suggests that factors beyond simple biology are at play.
The researchers propose that men in this age group “are more likely to be in stable long-term relationships, which have been associated with increased sexual activity and emotional intimacy.”
In another fascinating hypothesis, they suggest that as men get older, their “levels of desire may be starting to adapt to their partner’s declining levels of desire,” which could help explain the drop-off in later life.
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Parenthood Affects Men and Women’s Desire in Opposite Ways
One of the most fascinating unseen forces revealed by the study was how parenthood impacts libido differently for men and women.
For men, having more children was consistently associated with higher sexual desire. This effect grew stronger with each additional child, with the largest positive association found in fathers with five children. β = 0.43, indicating a strong positive association between fatherhood of five children and higher desire compared to mothers.
This stands in stark contrast to the experience of women, where the demands of parenthood are frequently linked to a decline in desire. A trend also suggested by the study’s data.
The researchers speculate that this opposing effect may reflect:
“…gendered differences in parental roles, stress levels, time availability, and energy investment within a family.”
They also offer a thought-provoking alternative explanation: it’s possible that “higher levels of desire may contribute to men having more children” in the first place, showing the complex relationship between cause and effect.
Single People May Actually Have a Higher Sex Drive
It’s often assumed that being in a committed relationship is the key to a healthy sex drive.
At first glance, the data seemed to support this, showing that partnered people had slightly higher desire on average. But when the researchers used a more powerful statistical lens, controlling for factors like age and gender, the picture flipped.
Partnered individuals actually reported lower sexual desire compared to their single counterparts. β = −0.10, a small but statistically significant effect suggesting that, all else being equal, being in a relationship was linked to a slight decrease in desire.
This surprising result challenges the idea that a relationship automatically sustains high desire. The study’s authors suggest this could be related to habituation in long-term partnerships, a phenomenon that “particularly for women, points to the potential for habituation and shifts in relational dynamics over time.”
In other words, the comfort of a long-term relationship may sometimes come at the expense of novelty.
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Your Career Choice Could Be Linked to Your Libido
In perhaps the most novel finding, the study uncovered a remarkable link between a person’s occupation and their level of sexual desire. Simple averages suggested that people in manual-labor and military jobs had the highest libido, but the researchers quickly noted this was likely because those fields are dominated by younger men.
The real story emerged after controlling for factors like age and gender. The study then compared all occupations to a baseline group: senior managers. The results were clear:
- Lower Desire Occupations (Compared to Senior Managers): After accounting for other factors, nearly every other occupation was linked to significantly lower sexual desire. This effect was especially strong for elementary workers (β = -0.27), skilled workers and craftsmen (β = -0.19), and office and customer service workers (β = -0.16).
This highlights the often-overlooked connection between our professional lives, daily stress, and our personal well-being. It suggests that the pressures and routines of our jobs can be a powerful, hidden influence on our libido.
Conclusion: Rethinking What We Know About Sex Drive
This research paints a new picture where desire isn’t just a biological switch. It’s a dynamic outcome of a person’s age, gender, parental role, relationship status, and even their career.
The fact that these demographic and life factors alone could explain nearly 30% of the variance in sexual desire underscores just how profoundly they shape this fundamental human experience.
As we learn more about the complex web of factors that shape our desires, how might we change the conversations we have about sexuality in our own relationships?
Drop your thoughts in the comments.
Do you feel your sexual behavior, or that of someone you love, is out of control? Then you should consult with a professional.
Are you looking for more reputable data-backed information on sexual addiction? The Mitigation Aide Research Archive is an excellent source for executive summaries of research studies.
