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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)

The Testicles & Scrotum
Human Male Reproductive System, Evolutionary Biology & Health, Testicular Cancer, Ejaculation, Sperm, Semen

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


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  





Create some good Sexual Karma - Share this Knowledge - Thanks!










Support an open honest discussion of human sexuality by sharing this knowledge.
https://www.sexualevolution.org/male-testicles.htm
Human Male Reproductive System: Testicles & Scrotum. Evolution, Biology, Health, Testicular Cancer, Ejaculation, Sperm, Semen


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(Albert Einstein)