Semen, Sexual Energy and Self-Mastery: What Ancient Yoga and Modern Science Really Say
Introduction
During one of my recent meditations, I felt an inner guidance from the Divine Mother encouraging me to explore more deeply—and to write about—the relationship between sexuality and spirituality.
Sexuality is an integral part of human existence, yet it remains a subject that is rarely discussed openly within many spiritual circles. Where discussion does occur, it can sometimes be surrounded by embarrassment, secrecy, misinformation and beliefs that have been passed from one generation to another without necessarily being examined either through their original spiritual context or through modern scientific evidence.
I therefore felt inspired to begin a series of articles exploring this fascinating and sometimes sensitive intersection between the body, sexuality, mind and spiritual life.
I approach this subject from two perspectives that have accompanied me through much of my life: my professional experience as a medical doctor with a special interest and experience in sexual health, and my personal journey as a student and practitioner of yoga and spirituality. My intention is neither to dismiss ancient wisdom in the name of science nor to present spiritual beliefs as established scientific facts. Rather, I hope to place both perspectives alongside one another and explore where they converge, where they differ, and what we might learn from each.
We will explore subjects that are often difficult to discuss openly—including sexual desire, masturbation, semen retention, brahmacharya, sexual energy, intimacy, relationships and the concepts of śukra, bindu and ojas. Alongside the traditional teachings, I will examine contemporary evidence relating to reproductive physiology, hormones, neuroscience, dopamine, sexual behaviour and psychological wellbeing.
This first article explores one of the most frequently misunderstood areas: semen, sexual energy and self-mastery. Does ejaculation really deplete a man's vitality? Does retaining semen increase testosterone or conserve energy? What did the ancient yogic texts actually teach about śukra, bindu, ojas and brahmacharya? And could the deeper spiritual teaching be less about retaining a physical substance and more about learning to understand and master desire itself?
I offer this series in a spirit of open enquiry rather than judgement.
Sexuality need not be separated from spirituality, nor should spirituality require us to fear or reject the human body. Perhaps by bringing ancient wisdom into an honest conversation with modern science, we can develop a healthier and more conscious understanding of both.
From Śukra, Bindu and Ojas to Testosterone, Dopamine and the Modern Science of Sexual Behaviour
For thousands of years, human beings have wondered whether sexual energy is simply a biological drive or whether it represents something deeper.
Indian philosophical and medical traditions developed sophisticated concepts such as śukra, bindu, ojas and brahmacharya to describe reproduction, vitality, sexual restraint and the transformation of human energy. Later Haṭha Yoga traditions went considerably further, explicitly associating the preservation of bindu—in some contexts identified with semen—with vitality and longevity.
Today, similar ideas have resurfaced through online movements advocating “semen retention” and abstinence from masturbation. Claims range from increased testosterone and physical strength to improved concentration, confidence, creativity and spiritual awakening.
But what do the ancient texts actually say?
And, equally importantly, what does modern science demonstrate?
The answer is more nuanced than either “semen retention is scientifically proven” or “the ancient teachings were simply wrong.”
Perhaps the most interesting meeting point between ancient yoga and modern neuroscience lies not in the chemistry of semen at all, but in a deeper question:
Can we experience sexual desire without becoming controlled by it?
Śukra: More Than Semen
In Ayurveda, śukra is traditionally regarded as the final of the seven dhātus or tissue principles.
Although the word can refer to semen in particular contexts, the Ayurvedic concept is broader than the modern biological definition of seminal fluid. It is associated with reproductive capacity, fertility and generative potential.
This distinction matters.
Modern semen is a definable biological substance containing spermatozoa suspended in secretions contributed principally by the seminal vesicles, prostate and other components of the male reproductive tract.
Śukra belongs to a completely different physiological framework.
It would therefore be inaccurate to make equations such as:
Śukra = semen = testosterone. ( This is inaccurate)
Testosterone is an androgen produced predominantly by Leydig cells in the testes and regulated through the hypothalamic-pituitary-gonadal axis. It influences libido, spermatogenesis, muscle, bone and many other physiological processes, but it is not a reservoir of “sexual energy” stored within semen.
Śukra is better understood as a traditional reproductive-tissue principle rather than as the ancient Sanskrit name for testosterone.
Ojas: The Essence of Vitality
Another frequently misunderstood concept is ojas.
The Suśruta Saṃhitā describes ojas as the essence or quintessence of the bodily tissues extending from rasa through to śukra, and associates it with strength and bodily vitality.
This is important because modern discussions sometimes reduce the concept to a simple sequence:
food → semen → retained semen → ojas.
The classical picture is considerably more complex.
Ojas represents systemic vitality within the Ayurvedic model. It is associated with bodily integrity, strength and effective functioning rather than simply the quantity of semen contained within the reproductive tract.
Consequently, statements such as:
“Ojas is testosterone”
or
“Ojas is the immune system”
are scientifically and historically problematic.
There is no known biomarker that corresponds specifically to ojas.
It is better regarded as a traditional systems-level concept of vitality rather than a measurable hormone, protein or immune cell.
Bindu: Where Semen Retention Becomes Explicit
The concept of bindu is particularly fascinating because its meaning varies considerably between Indian traditions.
Bindu literally evokes a drop, point or seed. In Tantric metaphysics it can have profound cosmological meanings.
In later Haṭha Yoga, however, bindu can become explicitly associated with sexual fluid and semen.
The Haṭha Yoga Pradīpikā, particularly in its discussion of vajrolī mudrā, gives remarkable importance to retaining bindu.
Its third chapter contains the famous formulation:
maraṇaṃ bindupātena jīvanaṃ bindudhāraṇāt
which presents the loss of bindu as death and its preservation as life. The subsequent verses associate preservation of bindu with freedom from fear of death and instruct the practitioner to protect both mind and sexual essence.
Whatever interpretation we place upon these statements today, we should acknowledge that this is not merely a modern invention.
Certain historical Haṭha Yoga traditions genuinely attributed extraordinary importance to preservation of sexual fluid.
However, that does not mean that their physiological
claims have been validated by modern medicine.
Patañjali Actually Says Something More Subtle
The Yoga Sūtras provide an important contrast.
Brahmacharya appears among Patañjali's five yamas—alongside ahiṃsā, satya, asteya and aparigraha.
Yoga Sūtra 2.38 states:
brahmacaryapratiṣṭhāyāṃ vīryalābhaḥ
Common translations render this approximately as:
“When established in brahmacharya, vigour is gained.”
The crucial word is vīrya.
Vīrya can convey vigour, strength, potency or energy. It should not automatically be translated as testosterone.
More importantly, the sūtra itself does not provide a biochemical mechanism saying that retained semen is converted into spiritual energy.
There is therefore an important historical distinction:
Patañjali:
Brahmacharya → vīrya or potency/vigour
Later Haṭha Yoga:
Retention of bindu → preservation of vitality and extraordinary yogic benefits
The two ideas became increasingly interconnected in later yogic interpretation, but they should not simply be treated as identical teachings.
What Does Modern Science Say About Semen Retention?
Modern reproductive physiology gives us a very different model.
Spermatozoa are continuously produced within the testes, mature through the epididymis and can subsequently be ejaculated. Sperm that are not ejaculated do not accumulate indefinitely as an ever-expanding reservoir of biological energy.
The reproductive system continues functioning whether ejaculation occurs frequently or infrequently.
This allows us to examine one of the fundamental assumptions behind semen retention:
Does retaining semen make the body physiologically stronger?
At present, there is no convincing evidence that it does.
Abstinence Does Increase the Quantity of Semen
Longer periods of ejaculatory abstinence generally increase:
semen volume;
sperm concentration;
total sperm count.
A major 2024 systematic review and dose-response meta-analysis involving 85 studies confirmed that shorter abstinence was associated with lower semen volume, total sperm count and sperm concentration.
At first sight, this might appear to support the traditional idea that semen accumulates during abstinence.
But there is an important complication.
More sperm does not necessarily mean better-quality sperm.
Longer Retention Can Worsen Some Measures of Sperm Quality
A 2024 meta-analysis of 13 studies involving 2,315 participants found that longer abstinence was associated with greater semen volume and sperm concentration.
However, longer abstinence was also associated with:
higher sperm DNA fragmentation
and
lower progressive sperm motility.
Another systematic review examining assisted reproduction found that shorter abstinence was associated with lower sperm DNA fragmentation and, across several included studies, improved pregnancy and live-birth outcomes compared with longer abstinence periods.
Earlier systematic reviews have nevertheless found considerable heterogeneity between studies, meaning that there is no universally optimal abstinence period for every fertility circumstance.
The scientific conclusion is therefore fascinating:
Longer abstinence tends to increase semen quantity, but prolonged storage does not necessarily improve sperm quality.
This challenges the simplistic biological assumption that semen becomes progressively more powerful the longer it remains within the body.
Does Semen Retention Increase Testosterone?
This is probably the most widespread scientific claim within contemporary semen-retention communities.
The evidence is weak.
A small human experiment examined endocrine responses before and after three weeks of sexual abstinence. Testosterone concentrations were higher after the abstinence period, but masturbation-induced orgasm itself did not significantly alter testosterone. The study was small and cannot establish that semen retention produces a sustained or clinically meaningful increase in testosterone.
More importantly, testosterone is not stored within semen and substantially “lost” during ejaculation.
The endocrine pathway is approximately:
Hypothalamus → GnRH → Pituitary → LH → Testicular Leydig cells → Testosterone
The body continuously regulates this system through feedback mechanisms.
Therefore, the popular model:
retain semen → accumulate testosterone → become progressively stronger
is not supported by established human physiology.
What Happens to the Body After Orgasm?
Although ejaculation does not meaningfully drain testosterone, orgasm certainly produces measurable neuroendocrine changes.
Studies in healthy adults demonstrate a significant rise in prolactin following orgasm, with concentrations remaining elevated for some time afterwards.
Orgasm also produces transient changes in autonomic activity, heart rate, blood pressure and catecholamines.
These physiological changes may contribute to the familiar post-orgasmic experience of:
relaxation;
reduced sexual motivation;
temporary satiation;
and, particularly in men, a refractory period.
Therefore, a temporary subjective change after ejaculation is physiologically plausible.
But this is very different from claiming that ejaculation causes a prolonged loss of testosterone, nutrients, masculinity or vital energy.
Perhaps Dopamine Is More Relevant Than Testosterone
This is where the comparison between yoga and neuroscience becomes considerably more interesting.
Sexual behaviour is a powerful natural reward.
Sexual cues engage neural systems involving the ventral striatum, nucleus accumbens, amygdala and prefrontal networks.
Dopamine participates particularly in motivation, reward anticipation, learning and incentive salience.
It is therefore misleading to describe dopamine merely as a “pleasure chemical.”
Dopamine is profoundly involved in wanting.
A simplified model is:
Sexual cue → attention → anticipation → wanting → sexual behaviour → reward → reinforcement
Repeated reinforcement can strengthen associations between cues and behaviour.
This does not mean that masturbation is a “dopamine addiction.” Dopamine participates in virtually every important motivated behaviour, including eating, exercise, learning, relationships and achievement.
The clinically important question is whether behaviour remains voluntary and flexible.
What Happens When Sexual Behaviour Becomes Compulsive?
Modern neuroscience provides some intriguing findings.
Neuroimaging studies of people with compulsive sexual behaviour have demonstrated increased responses to erotic cues within regions including the ventral striatum, dorsal anterior cingulate and amygdala.
One influential study found that people with compulsive sexual behaviour demonstrated greater desire in response to explicit sexual cues without correspondingly greater liking.
This distinction is fascinating.
A person can increasingly want something without necessarily enjoying it proportionately more.
That phenomenon resembles the neuroscience concept of incentive salience.
And it provides an unexpected bridge to ancient contemplative psychology.
From Kāma to Compulsion
Yoga approached the problem through an entirely different conceptual language.
The yogic practitioner observes sensory attraction and learns not to become automatically governed by it.
Modern behavioural science might describe part of this process through concepts such as:
attentional regulation;
inhibitory control;
delayed gratification;
urge tolerance;
metacognitive awareness;
behavioural flexibility.
The two systems are not scientifically equivalent.
Yet both confront a remarkably similar human problem:
When does desire serve us, and when do we become servants of desire?
Brahmacharya Reconsidered
Perhaps this allows us to reconsider brahmacharya.
In popular discussion, brahmacharya is sometimes reduced to:
“Never ejaculate.”
But a psychologically richer interpretation is:
“Do not become enslaved by sensual desire.”
The difference is profound.
The first concerns retention of a biological fluid.
The second concerns mastery of consciousness and behaviour.
Patañjali places brahmacharya among ethical disciplines concerned with the transformation of the practitioner. The promise of vīrya following establishment in brahmacharya can therefore be understood as vigour or potency without requiring us to claim that Patañjali was describing an increase in serum testosterone.
From this perspective, a modern parallel might look like this:
Sexual cue → desire → awareness → conscious choice
rather than:
Sexual cue → desire → automatic behaviour → reward → repetition
This does not require suppression of sexuality.
It requires freedom in our relationship with sexuality.
Masturbation Is Not the Same as Compulsive Masturbation
This distinction is essential.
Modern medicine does not classify masturbation itself as a psychiatric disorder.
The ICD-11 framework for Compulsive Sexual Behaviour Disorder (CSBD) instead focuses on a persistent failure to control intense repetitive sexual impulses or behaviours resulting in significant impairment or distress.
High sexual desire or frequent masturbation alone is insufficient for the diagnosis.
There is another particularly important safeguard.
Distress arising solely from moral or religious judgement about one's sexual thoughts or behaviour is not sufficient to diagnose CSBD.
This becomes crucial when discussing sexuality and spirituality.
A person who masturbates but believes that doing so violates his spiritual ideals may experience genuine guilt. That does not automatically mean that he has a compulsive sexual disorder.
Conversely, someone whose pornography or masturbation behaviour repeatedly interferes with relationships, work or everyday life despite unsuccessful attempts to control it may have a genuine clinical problem.
The important variable is therefore not simply frequency.
It is control and consequences.
Where Ancient Yoga and Modern Science Disagree
We should not manufacture harmony where genuine differences exist.
Certain Haṭha Yoga texts attribute extraordinary physiological and spiritual significance to retaining bindu. The Haṭha Yoga Pradīpikā associates bindu retention with preservation of life and yogic attainment.
Modern science has not demonstrated that ordinary ejaculation:
depletes testosterone;
produces clinically important nutritional deficiency;
diminishes long-term physical strength;
shortens lifespan;
or removes a measurable reservoir of spiritual energy.
Indeed, prolonged ejaculatory abstinence can increase sperm DNA fragmentation and reduce progressive motility even while increasing sperm quantity.
A literal biomedical interpretation of every traditional semen-retention claim is therefore difficult to sustain.
But Where Might They Meet?
The convergence may occur at a completely different level.
Ancient yoga asks us to examine the relationship between desire and consciousness.
Modern neuroscience asks us to examine the relationship between cue, motivation, reward, learning and behavioural control.
The vocabulary is radically different.
But both can lead us to the same profound question:
Can I experience a powerful desire without automatically needing to satisfy it?
That is not semen retention.
It is self-regulation.
And perhaps this is where the ancient concept of brahmacharya becomes particularly relevant to contemporary life.
From Semen Retention to Sexual Self-Mastery
The scientific evidence does not currently support the proposition that retaining semen creates a progressively increasing reservoir of testosterone or measurable biological energy.
But that conclusion need not make the spiritual discussion irrelevant.
The value of periods of voluntary sexual restraint may lie elsewhere.
Choosing occasionally not to respond immediately to sexual desire may provide an opportunity to observe:
What triggered this desire?
Is this sexual arousal, boredom, loneliness, anxiety or habit?
Am I choosing this behaviour, or simply responding automatically to a cue?
Can I experience an urge without immediately acting upon it?
These are psychologically meaningful questions.
For someone whose behaviour is already healthy and freely chosen, masturbation need not be pathologised.
For someone caught in a repetitive pattern that feels increasingly automatic, developing greater awareness and behavioural flexibility may be valuable.
And for a spiritual practitioner, consciously regulating sexual desire may form part of a broader discipline involving meditation, concentration and mastery of the senses.
The Body Is Not the Enemy
There is also a danger in approaching spirituality through fear of sexuality.
Sexual desire is part of normal human biology.
The goal of spirituality need not be hatred of the body.
Nor should science dismiss every contemplative insight merely because ancient cultures described human experience through a different physiological model.
A more mature dialogue allows both perspectives to retain their integrity.
Science tells us what can be objectively demonstrated about sperm, hormones, neural pathways and behaviour.
Spiritual traditions ask what relationship we should cultivate with desire, pleasure, attachment and consciousness.
They are related questions, but they are not identical questions.
Conclusion: Perhaps the Real Energy Is Attention
Śukra is not simply testosterone.
Bindu cannot be reduced to a modern hormone.
Ojas has no established biochemical equivalent.
And there is currently no convincing scientific evidence that semen retention itself creates a reservoir of extraordinary physiological power.
Yet the yogic emphasis on mastery of desire may contain an insight that remains highly relevant.
Every powerful desire captures attention.
Repeated behaviour can become conditioned behaviour.
And a person who learns to observe an impulse without automatically obeying it develops something potentially more valuable than retained semen:
freedom of choice.
Perhaps, therefore, the most useful modern interpretation of brahmacharya is not the fear of losing sexual energy.
It is learning how to direct our energy consciously.
The deeper question may not be:
“How long can I retain my semen?”
but rather:
“Who controls my desire—my conscious awareness, or the desire itself?”
In that distinction lies an intriguing meeting point between sexuality, neuroscience and spirituality.
References and Further Reading
Patañjali. Yoga Sūtras, II.38: brahmacaryapratiṣṭhāyāṃ vīryalābhaḥ. The verse associates establishment in brahmacharya with attainment of vīrya, commonly translated as vigour, potency or strength.
Svātmārāma. Haṭha Yoga Pradīpikā, Chapter III, particularly verses 87–91. These passages explicitly discuss bindu/śukra preservation within the context of Vajrolī Mudrā.
Suśruta Saṃhitā, Sūtrasthāna, Chapter 15. Ojas is described as the essence of the bodily tissues extending from rasa through śukra and is associated with strength/vitality.
Du C, Li Y, Yin C, et al. Association of abstinence time with semen quality and fertility outcomes: a systematic review and dose-response meta-analysis. Andrology. 2024;12(6):1224–1235. The review included 85 studies and demonstrated the complex relationship between abstinence duration and semen parameters.
Persico N, et al. Effects of long and short ejaculatory abstinence on sperm parameters: a meta-analysis of randomized controlled trials. 2024. Thirteen studies involving 2,315 participants were included; longer abstinence was associated with greater volume and sperm concentration but higher DNA fragmentation and lower progressive motility.
Sørensen F, Melsen LM, Fedder J, Soltanizadeh S. The influence of male ejaculatory abstinence time on pregnancy rate, live birth rate and DNA fragmentation: a systematic review. Journal of Clinical Medicine. 2023;12:2219.
Hanson BM, Aston KI, Jenkins TG, Carrell DT, Hotaling JM. The impact of ejaculatory abstinence on semen analysis parameters: a systematic review. Journal of Assisted Reproduction and Genetics. 2018;35:213–220.
Exton MS, Krüger THC, Bursch N, et al. Endocrine response to masturbation-induced orgasm in healthy men following a 3-week sexual abstinence. World Journal of Urology. 2001;19:377–382. Orgasm increased prolactin and cardiovascular/neuroendocrine measures, while testosterone was not acutely changed by orgasm.
Exton MS, Krüger THC, Koch M, et al. Coitus-induced orgasm stimulates prolactin secretion in healthy subjects. Psychoneuroendocrinology. 2001;26:287–294.
Voon V, Mole TB, Banca P, et al. Neural correlates of sexual cue reactivity in individuals with and without compulsive sexual behaviours. PLoS ONE. 2014;9. The study identified differences in neural responses involving the ventral striatum, dorsal anterior cingulate and amygdala and reported an important distinction between sexual “wanting” and “liking.”
Gola M, Draps M. Ventral striatal reactivity in compulsive sexual behaviors. Frontiers in Psychiatry. 2018;9:546. Review of neuroimaging evidence concerning reward anticipation and ventral-striatal responses in compulsive sexual behaviour.
Kraus SW, Krueger RB, Briken P, et al. Compulsive sexual behaviour disorder in the ICD-11. World Psychiatry. 2018;17:109–110. The authors emphasise impaired control and functional consequences and caution against diagnosing high sexual drive or distress attributable solely to moral judgement.
Note
This article compares concepts drawn from different historical and epistemological traditions. Terms such as śukra, bindu, ojas, vīrya and brahmacharya have context-dependent meanings and should not be treated as direct equivalents of modern anatomical, endocrine or neuroscientific constructs. References to traditional physiology describe historical spiritual or medical models and should not be interpreted as established biomedical claims.
Important Safety Advice
Please seek urgent medical help if you experience severe genital or testicular pain, significant genital injury or bleeding, an erection lasting more than four hours, or another acute sexual-health problem that you believe requires immediate attention.
If sexual thoughts or behaviours feel out of control and you are at risk of harming yourself or another person, or you are experiencing suicidal thoughts or a mental-health crisis, seek urgent professional help immediately. In the UK, call 999 or attend an Emergency Department if there is immediate danger.
Do not attempt potentially harmful practices described in historical or online material, including forcefully preventing ejaculation, inserting objects or substances into the urethra, extreme sexual suppression, or advanced sexual/yogic practices without appropriate expert guidance. Historical descriptions should not automatically be interpreted as safe medical recommendations.
Reader Safety and Medical Disclaimer
This article is intended for education, reflection and general information only. It explores sexuality through medical, scientific, yogic and spiritual perspectives and should not be regarded as individual medical advice, diagnosis or treatment.
Sexual health is highly individual. If you have concerns about sexual function, fertility, ejaculation, masturbation, pornography use, compulsive sexual behaviour, sexually transmitted infections, mental health, or any other aspect of your sexual wellbeing, please seek advice from an appropriately qualified healthcare professional. Do not stop prescribed medication or alter medical treatment on the basis of information in this article.
Traditional concepts such as śukra, bindu, ojas, brahmacharya, prāṇa and sexual-energy transformation belong to particular philosophical, Ayurvedic and yogic traditions. Where these concepts are discussed, they should not be assumed to have direct equivalents in modern anatomy, endocrinology or neuroscience unless supported by scientific evidence. Spiritual teachings and personal experiences are presented as such and are not offered as scientifically established medical facts.
Practices involving prolonged fasting, extreme sexual suppression, attempts to prevent ejaculation by force, urethral manipulation, advanced mudrās, or other practices that could cause physical or psychological harm should not be attempted solely on the basis of descriptions in traditional texts or information found online. Some historical yogic practices were intended to be undertaken within specific traditions and under experienced guidance.
There is no single “correct” frequency of masturbation, ejaculation or sexual activity that applies to everyone. Frequency alone does not determine whether sexual behaviour is healthy or unhealthy. More important considerations include consent, personal choice, physical safety, emotional wellbeing, degree of control, and whether the behaviour is interfering with relationships, work or everyday life.
Readers should also be cautious about shame. Experiencing sexual desire does not by itself indicate illness, moral failure or lack of spiritual development. Equally, choosing celibacy or sexual restraint for personal or spiritual reasons can be a valid choice when it is freely undertaken and does not cause harm.
If sexual thoughts or behaviours become increasingly difficult to control, cause significant distress, or interfere with relationships, work or daily functioning, please discuss this with a GP, sexual-health professional or appropriately qualified mental-health professional.
The purpose of this series is therefore not to prescribe how anyone should express their sexuality, but to encourage informed, compassionate and evidence-based reflection on the relationship between sexuality, health, self-awareness and spiritual practice.
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