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Karene

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)

On Male Ejaculation, Semen & the Penis
Evolution & Sexual Health, Human Reproductive Systems, Testicles

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


Male Orgasm / Ejaculation of Semen

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

From the essay: 'As the point of orgasm approaches, pre-ejaculate production will normally stop, and the hole in the tip of the penis becomes slit-like. The testicles become hard and are drawn up near the body in preparation. Breathing becomes heavier, and there may be involuntary contractions of major muscles (convulsions) throughout the body.
Finally, the psychological and physical pressure to ejaculate is released in a series of muscular contractions, usually about 8 major contractions spaced a second or so apart, followed perhaps by several smaller ones that can last 45 seconds or so. There is a wide variation in semen production, but about 60 percent on average, comes from glands called the seminal vesicles, whereas 38 % comes from the prostate, with the remainder from glands such as the Cowper's.

https://www.whitelotuseast.com/MaleSexuality.htm


Whats in Semen: Spit or Swallow?

Obviously, semen contains spermatozoa, but sperm accounts for only a small percentage of spunk. Cum is 90% seminal fluid, which is composed of dozens of chemical components. The base of seminal fluid is primarily fructose (sugar) and proteins, with many other trace minerals and substances.
Healthy semen (from a well nourished, disease free male) may in fact be not only safe to eat, but actually good for you. Semen is a source of highly concentrated, high-quality protein amd also contains high concentrations of some minerals, such as zinc, and trace amounts of calcium and magnesium.

Read More: Whats in Semen: Spit or Swallow?


Study Shows Health Benefits of Swallowing Semen & Vaginal Absorption

A recent study found that women who gave their men oral sex, and swallowed, had a lower risk of preeclampsia, the dangerously high blood pressure that sometimes accompanies pregnancy.

'The present study shows that oral sex and swallowing sperm is correlated with a diminished occurrence of preeclampsia,' said the Dutch authors.

A study of college students at the State University of New York in Albany suggests that semen acts as an antidepressant. Females in the study who were having sex without condoms had fewer signs of depression than women who used condoms or abstained from sex.

'These data are consistent with the possibility that semen may antagonize depressive symptoms and evidence which shows that the vagina absorbs a number of components of semen that can be detected in the bloodstream within a few hours of administration.'

Read More: Not Just Good but Good for You - Studies on the Health Benefits of Sex


Semen Collection from Sexual Intercourse not Masturbation: Methods for Artificial Reproduction

Although masturbation is the standard method for the collection of a sperm sample, both for diagnostic and therapeutic purposes, other approaches have been described and assessed. Production of semen using specially designed condoms (Silastic seminal fluid collection device - SCD) has been shown to result in samples with better laboratory characteristics than samples obtained after masturbation or coitus interruptus.

Read More: Semen Collection from Sexual Intercourse not Masturbation: Methods for Artificial Reproduction


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


 

 



 


 


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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https://www.sexualevolution.org/ejaculation-penis-semen.htm
Evolution & Sexual Health: Male Ejaculation. Human Reproductive System, Semen, Orgasm, Penis, Testicles


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