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Introduction / Summary (2018): Hello and welcome to our Sexuality pages. While this is not a pornographic site, it is provocative - founded upon what people search on the Internet (which is very interesting!). We then relate this to our biological and cultural evolution.
Sex is obviously important to people - and if you want to improve your sexual relationships then knowing the truth about our human evolution is the best foundation. By opening our minds to a greater diversity of behaviors, this knowledge will help you creatively cultivate healthy pleasurable moral attitudes and sexy smutty relationships (free from religious guilt & cultural myths).
Support an open honest discussion on the truth of our sexual evolution and behaviour. If you support sex positive, moral, informed sexual behaviour please share this knowledge. (These pages have a diverse collection of fascinating information relating to our human sexual evolution so people will appreciate it - see our 'nice letters' page!).
Sincerely, Karene.

"It is not enough to conquer; one must learn to seduce." (Voltaire) - "Desire is the essence of a man." (Spinoza)

Evolutionary Philosophy of Male Sexuality
Evolution of Man (Instincts vs Culture), Biology, Psychology, Sexual Health & Behaviour, Orgasm, Masturbation, Penis, Sperm Competition

Hello. Thanks for visiting our evolutionary philosophy of human sexuality pages. We are currently researching good quality sites relating to our biological and cultural sexual evolution - as a way of collecting and presenting the most important / latest knowledge and research.

Below you will find summaries of articles & websites on Male Sexuality, i.e. latest research on evolution, men's sexual health & behaviour, the penis, erections, semen & sperm competition, orgasm, desire, hormones, fetish & fantasy, masturbation, sex education, pornography, sexual orientation, love, family & relationships, infidelity, sexually transmitted diseases, prostate cancer, infertility, premature ejaculation, erectile dysfunction etc.
Compared with other search terms, 'male' gets relatively few searches a day (though 'man' is higher with 12,000 searches, as is 'naked men' 19,000 and 'man health' 7,000).

The top related searches for male are;
male (2,389), male masturbation (4,314), male model (3,093), nude male (2,288), male stripper (1,898), naked male celebrities (1,067), male orgasm (995), male masturbation techniques (993), gay male (971), male ejaculation (900), male escort (870)

We hope you find the following Male Sexuality articles & websites interesting, informative, stimulating, useful and fun.

Evolution, Human Reproduction & Fertilization: Sperm Competition & the Penis

A very interesting essay from the journal of Evolutionary Psychology on sperm competition and its role in shaping the human penis, (size, length, width, forceful ejaculation), evolutionary strategies for successful fertilization i.e. semen displacement and coagulation. On sexual intercourse and evolutionary benefits of deep penis thrusting, function of the foreskin and effects of circumcision, premature ejaculation, female reproductive strategies i.e. copulation with multiple partners, human sexual behaviour and wife rape (males having sex with their partner if suspecting them of infidelity).

Read More: Evolution, Human Reproduction & Fertilization: Sperm Competition, Semen Displacement & Penis

Human Evolution: A History of Sex

Evidence that people have been promiscuous for a long time

Lotharios everywhere will be pleased to hear that monogamy does not appear to be a natural human state. That, at least, is the conclusion of a study conducted by Michael Hammer at the University of Arizona in Tucson, and just published in Nature Genetics. By examining the DNA of living people, Dr Hammer and his colleagues have found that far fewer men than women pass their genes on to subsequent generations.

Read More: Human Evolution: A History of Sex

Study of the Brain while watching Pornography

By studying men watching pornographic videos, researchers in Canada have pinpointed areas of the brain that become active when the men tried to avoid being stimulated. In evolutionary terms, these regions of restraint (the prefrontal cortex) are newer than the more primitive areas where the sexual urges arise in the first place (the limbic system).

Read More: Prefrontal Cortex, the Primate Brain (Limbic System), Sexual Arousal & Control

Male Sexual Evolution: Sperm, Competition and Violence

Violence is predominately a male phenomena. When it comes to sperm makers, success is likely to crown those who outcompete their rivals, and so, in species after species, it is the males who are larger, nastier, more likely to be armed with lethal weaponry and a violent disposition to match. Natural selection has outfitted males with the tools for success in male-male competition, much of it violent.

Read More: Male Sexual Evolution: Sperm, Competition and Violence

Cultural Myths About Male Sexuality

The myths regarding male sexuality have been particularly tenacious because men have traditionally not talked about their sexual feelings and experiences honestly and openly with each other.
Myths debunked include penis size, that men are always willing and want sex, very few men are virgins, sex requires an erection, sex is over when a man comes, all orgasms are earth shattering, men in relationships don't masturbate.

Read More: Cultural Myths about Male Sexuality

Male Sexuality - Arousal, Penis Size, Erections & Orgasm

An essay on male sexuality which describes the causes and signs of sexual arousal (complex interaction of physical and psychological processes) followed by information on erections and male orgasm / ejaculation.

Read More: Male Anatomy, Erections and Penis Size

Read More: Male Orgasm / Ejaculation of Semen

Why do Men have Nipples?

From the essay: 'During the very early stages of fetal life all humans are basically bisexual. Among other things, you have two sets of primitive plumbing - one male, one female. Only one set develops into a mature urogenital system, but you retain traces of the other for the rest of your life.

It's tempting, therefore, to say that male nipples are yet another vestige of your carefree bisexual youth. Male nipples though are not vestigial. They're full-sized and fully equipped with blood vessels, nerves, and all the usual appurtenances of functioning organs. .. Both male and female babies are born with the main milk ducts intact - the gland that produces milk is there in the male, but it remains undeveloped unless stimulated by the female hormone, estrogen.'

Read More: Why do Men have Nipples?

Human Hormones: Androgens

From the website: 'Androgens are sex hormones produced primarily by a male's testes, but are also produced in small amounts by the female's ovaries and the adrenal gland.
Androgens help trigger the development of the testes and penis in the male fetus. They jump start the process of puberty and influence the development of facial, body and pubic hair, deepening of the voice, and muscle development, the male secondary sex characteristics. After puberty, androgens, specifically testosterone, play a role in the regulation of the sex drive.'

Read More: Human Hormones: Androgens

Masturbation vs Sexual Intercourse: A Study of the Differences in Semen. A Guide for Infertility Clinics

Six semen samples were collected from each of 38 infertile men via masturbation and sexual intercourse using a semen collection device (SCD).
The volume of seminal plasma, total sperm count, sperm motility, and percentage of normal spermatozoa were significantly higher in samples collected at intercourse than masturbation. In addition, the markers of the secretory function of the prostate and the outcome of sperm function tests were also significantly higher.

Read More: Masturbation vs Sexual Intercourse: Study of the Differences in Semen. A Guide for Infertility Clinics

Alfred Kinsey on Male Homosexuality

'The data indicates that at least 37% of the male population has some homosexual experience between the beginning of adolescence and old age. Among the males who remain unmarried until the age of 35, almost 50 % have had a homosexual experience.
It is true that there are persons in the population whose histories are exclusively heterosexual and exclusively homosexual. But the record shows that there is a considerable portion of the population whose members have combined both homosexual and heterosexual experience.'

Read More: Alfred Kinsey on Male Sexuality, Homosexuality & Bisexuality

Study of Sexual Arousal in Gay & Heterosexual Men & Women

Three decades of research on men's sexual arousal show patterns that clearly track sexual orientation - gay men overwhelmingly become sexually aroused by images of men and heterosexual men by images of women.
In contrast to men, both homosexual and heterosexual women showed a bisexual pattern of psychological as well as genital arousal. That is, heterosexual women were just as sexually aroused by watching female stimuli as by watching male stimuli, even though they prefer having sex with men rather than women.

Read More: Study Suggests Differences in Female And Male Sexuality - Sexual Arousal & Orientation

Study of Aging in Men & Hormones: Decrease in Sexual Desire, Arousal & Activity

Few studies have assessed the role of pituitary and gonadal hormones on age related changes in sexual behavior in healthy men. We conducted an evaluation of sexual function and behavior in 77 healthy married men aged 45 - 74 years.
Significant age related decreases in sexual desire, sexual arousal and activity, and increases in erectile problems were noted.

Read More: Study of Hormones & Aging in Men: Decrease in Sexual Desire, Arousal & Erectile Activity

Lifestyle Changes Can Improve Erectile Dysfunction

A study reports that erectile dysfunction is significantly and independently associated with age, cardiovascular disease, diabetes and lack of physical activity.
As many as 18 million men may be affected with erectile dysfunction in the United States. The recent development of effective oral medications to treat erectile dysfunction has raised awareness, however lifestyle changes such as exercise and nutrition may prevent erectile function.

Read More: Study Shows Exercise & Diet Improves Male Sexual Function / Erectile Dysfunction

Want a Good Sex Life in Later Life? Watch your Health

A study from Harvard Health Professionals shows that chronic illness and the medications used to treat them account for many of the sexual problems of older men. Sexual dysfunction is most prevalent in men with illnesses such as diabetes, hypertension, heart disease, stroke and depression. 'The secret to preserving sexuality is to stay healthy and to build healthy relationships - and both require a series of wise choices throughout life.' (Harvey B. Simon, M.D.)

Read More: Want a Good Sex Life in Later Life? Watch your Health & Lifestyle

Male Sexual Function, Disorders & Treatment

A comprehensive essay on male sexual and reproductive functioning. Topics include: normal size of the male sexual organs, aging and sexuality, role of neurochemicals in each stage of the sexual cycle, erections, influence of psychological factors, drugs and disease on all aspects of sexual functioning and the investigation and treatment of male sexual disorders.

Read More: Male Sexual Function, Disorders & Treatment

Read More: Penis Anatomy & Erections

Read More: Normal Penis & Testicle Size

Study on Erectile Dysfunction & Cardiovascular Disease

Preliminary findings from clinicians at the Research Institute of the McGill University Health Centre in Montreal, show that men with erectile dysfunction are more likely to have cardiovascular disease. Cardiovascular disease affects approximately 40,000 Canadian men annually.

Read More: Men's Sexual Health: Research Links Erectile Dysfunction And Cardiovascular Disease

The Easy Erection: Sexologists Experiment with Viagra

An interesting essay written by two sexologists who experiment with Viagra. They are concerned that the emotional or psychological aspects of erectile dysfunction (stress, anxiety, disconnection from partner, lack of communication) are not being addressed by doctors prescribing Viagra (which helps the physical ailment).
Note: It is very difficult to prove that sexual disorders are physical or psychological. They are an interconnected mix of both.

Read More: The Easy Erection: Penile Panacea? Sexologists Experiment with Viagra

Viagra: How it Works, Statistics & Side Effects

As Viagra moves into the bloodstream, it starts to block an enzyme called PDE-5. Blocking the enzyme eventually increases blood flow to areas where PDE-5 is most heavily concentrated - the penis, nose and skin. Diminished blood flow to the penis is the cause of most erectile dysfunction problems.

Read More: Viagra: How it Works, Statistics, Male Impotence, Side Effects


Analyse any human emotion, no matter how far it may be removed from the sphere of sex, and you are sure to discover somewhere the primal impulse, to which life owes its perpetuation.Analyse any human emotion, no matter how far it may be removed from the sphere of sex, and you are sure to discover somewhere the primal impulse, to which life owes its perpetuation. ... The primitive stages can always be re-established; the primitive mind is, in the fullest meaning of the word, imperishable. ... Mans most disagreeable habits and idiosyncrasies, his deceit, his cowardice, his lack of reverence, are engendered by his incomplete adjustment to a complicated civilisation. It is the result of the conflict between our instincts and our culture. (Sigmund Freud)

Related Pages

Male Sexuality: Evolution, Health & Masculinity
Circumcision of Penis / Foreskin: Health, Religion & Culture Penis Enlargement: Evolution, Culture & Male Dominance, Drugs, Exercises
Ejaculation: Male Reproductive System, Semen, Health Benefits Penis Size: Studies & Statistics on Big, Small, Average
Erectile Dysfunction: Information, Treatment, Causes, Drugs Prostate: Health Studies & Information, Massage
Erections: Biology, Function, Sexual Arousal, Puberty Prostate Cancer: Symptoms, Treatment, Ejaculation as Prevention
Foreskin: Function, Anatomy, Pictures Premature Ejaculation: Information, Prevention, Control Methods
Health: Sexual Health of Men: Evolution, Problems, Studies Sperm: Evolution & Competition, Function, Health
Masturbation in Males: Techniques and Tips Testicles & Scrotum: Biology, Function, Testicular Cancer
Models: Masculine Beauty, Pictures of Male Nudes, Celebrities Testosterone: Androgens, Declining Levels, Emotions, Violence
Naked Men: Male Erotic Art, Renaissance Paintings, Anatomy Pictures Viagra: Drugs, Studies & Research on Erectile Dysfunction
Penis: Anatomy, Human Reproduction, Erection, Orgasm  

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Support an open honest discussion of human sexuality by sharing this knowledge.
Evolutionary Philosophy of Male Sexuality: On the Biological, Psychological & Social aspects of Manhood (Evolved Instincts vs Culture). Information on the Penis (size, enlargement), Erections, Foreskin, Circumcision, Testicles, Premature Ejaculation in Men.

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