Genital microflora, pessaries and mean oxytocin

Hung like a … bull: “This is a report on advances in the field of penile prosthesis surgery for the fibrotic penis through the years 2006 to 2008. In that time, bovine pericardium was added to the choices of graft materials used to expand the corpora to accommodate the implant alongside the fibrous tissue.

From an article called “Management of Penile Implant Complications”: “Avoid the penile dorsal nerve complex at all costs …. A cut across the dorsal nerve with electrocautery cannot be reasonably repaired, and the patient will be left with distal penile numbness—a recipe for a tough-to-defend malpractice case.

The Malassezia yeasts are … reported as part of the microflora of male genital region, mostly in uncircumcised males. The prevalence of Malassezia yeast colonization on the glans penis of circumcised males is discussed in multiple studies. We report the case of a male patient with extensive pityriasis versicolor that does not involve the preputial space.

We present a comprehensive account of clitoral anatomy, including its component structures, neurovascular supply, relationship to adjacent structures (the urethra, vagina and vestibular glands, and connective tissue supports), histology and immunohistochemistry. We related recent anatomical findings to the historical literature to determine when data on accurate anatomy became available.

Six experts review the evidence and disagree about whether the G-spot is real: “Although a huge amount of data (not always of good quality) have been accumulated in the last 60 years, we still need more research on one of the most challenging aspects of female sexuality.

Development of pelvic surgery finds its roots in the Ebers papyrus (1550 BC) and evolved from Hippocrates (400 BC) who used pessaries with pomegranate to reduce uterine prolapse. Other maneuvers were also used. Vesalius was the first to provide a detailed description of the entire female genital tract. Adolf Retzius defined the boundaries of the prevesical space in 1849. The current concepts regarding the etiology of cystocele were proposed in 1912.

Dickless wonders: “Though male wasp spiders have testes that produce sperm, they lack penises. Instead, the arachnids ejaculate into a small web and then store this sperm in special forelegs called pedipalps, which “look like boxing gloves,” said Schneider.

Female damselflies turn butch to dissuade pesky males

Whale threesome!

Women more aroused by monkey sex than men are

Oxytocin turns out to be the hormone of the clan, not of universal brotherhood. Psychologists trying to specify its role have now concluded it is the agent of ethnocentrism.

Bless their hearts o’ gold: “Still other prostitutes, such as Klee herself, focus on providing sex for seniors in retirement homes or for the disabled – an area the BSD spokeswoman said she expects to grow swiftly as Germany’s population ages.

Major League Whore (such a harsh word) trading cards

Oregon State has some odd values

Schéhérazade, Sir Henry Head and the Ladybirds

Cover for an LP by Scheherazade

I wish I knew what artist made this cool cover for a recording by a Japanese band called Scheherazade. I hit upon it while looking for images of the ballet Scheherazade, based on Rimsky-Korsakov’s music. The choreographer was Michel Fokine. The ballet’s first performance starred Ida Rubinstein and Vaslav Nijinsky.

Findings from the National Survey of Sexual Health and Behavior (a 140-page pdf)

There has been a transition for women in direction towards a stereotypically ‘male’ personality profile, but not at the expense of traditionally socially important female traits. Comparisons in psychological profile subscales showed an increase in dominance, exhibition, aggression and achievement.

Using … data from a high-fertility polygynous human population of Senegal, we first show that extraversion, a personality dimension predicting men’s mating behavior in this population, is associated with inter-individual differences in testosterone profiles, with men in the top quartile of extraversion distribution having 29% higher testosterone levels.

This study conducts an exploratory investigation of various post-coital behaviors that the authors propose may reflect the divergent adaptive reproductive strategies of each sex as understood from an evolutionary perspective.

What the presence of attractive young women can do to men

The scientific case for masturbation — 4 theories about its adaptive function

The best cover for a Scheherazade LP or cd, c. 1963.

A recent study suggests that daily masturbation and ejaculation can reduce the amount of accumulated DNA damage in sperm by 12%.  Therefore wasting sperm into a sock can actually improve the mobility of sperm and increase fertility.Here’s the study

Some history of masturbation: “Freud famously concluded a 1912 symposium on masturbation for the Psychoanalytical Society in Vienna by saying, ‘I think the time has come to break off. For we are all agreed on one thing–that the subject of masturbation is quite inexhaustible.’

Mind Hacks posted on erotic asphyxia. Here’s a review of the literature on autoerotic deaths between 1954 and 2004. Here’s a pdf of the first paper that I could find on this topic (in the British Medical Journal, 1960). After a gruesome description of the circumstances in which four men had died, the authors venture a Freudian hypothesis — somehow, the men wrapped themselves in plastic in order to simulate a return to the womb. (!) Then the authors make a more sensible claim: “A much less elegant and more superficial explanation is that these people were trying to achieve some undifferentiated thrill or excitement from partial suffocation or anoxia. This factor may have existed but it does not explain the transvestism, sexual arousal, or complete enclosure of the body. It is an interesting reflection that the sexual impulse in man is so protean in its manifestations that a technical advance resulting in a new packaging material can result in a new perverse manifestation.”

Here are some more recent (but equally sad) cases involving less typical autoerotic causes of death: “These modalities include ligature around the thorax or abdomen, plastic bags covering the face, electrical current, inhalation of a toxic gas or chemicals, or partial or total submersion, known as aquaerotic asphyxiation. This study highlights 11 cases of atypical autoerotic death, including asphyxia with a plastic bag, electrocution, and inhalation of butane and nitrous oxide (N2O).” Two more atypical cases: “We here report the case of a 34-year-old man who died due to asphyxia, secondary to body wrapping in the largest and most complex plastic bag ever involved in a published case of autoerotic death“; and “Unusual death of a 24-year-old man, involving propane inhalation and plastic bag suffocation, is described.

Back to a less depressing topic: You get a sense of the erotic nature of Scheherazade from this review of a perfomance by Anna Kisselgoff in the NY Times (Jan. 18, 1981). Kisselgoff summarizes part of the narrative as follows: “The wives bribe the chief eunuch to release the slaves who spring out to make love to the women. The leader of the orgy is Zobeide’s ‘golden slave’ …. It is common to think of ‘Scheherazade,’ with its frank acknowledgement of sexual passions, as an early expression of Freud’s century. To most Anglo-Saxon audiences at the time, it was inconceivable that a powerful queen would bother with a black slave. Russians brought up on tales of Tartar harems and white princesses had no trouble with the idea.” Here’s Yvonne de Carlo as she appeared in a 1947 movie called Song of Scheherazade.

Yvonne de Carlo in Song of Scheherazade (1947)

Based on the results of my study, there is a percentage of women (just over 30 percent) who feel powerful when performing fellatio. Apparently some women find it empowering and believe that it can wield a lot of power.

Sir Henry Head’s self-experimentation: “We then discovered that the glans penis responded to cutaneous stimuli in that peculiar manner with which we were already familiar from our study of the first stage of recovery after nerve division. … When … [the tip] was dipped into water at 40° C, no sensation of heat was produced, but [Head] experienced an unusually disagreeable sensation of pain. … But, as soon as the water covered the corona without reaching the foreskin, both cold and pain disappeared, giving place to an exquisitely pleasant sensation of heat.

For women not using hormonal birth control, it would appear that some information regarding female fertility appears to be encoded in gait.

Women with higher estradiol levels in the peri-ovulatory and luteal phase of the menstrual cycle were correlated with higher senses of desirability and a lower relationship commitment in women.” But SciCurious has objections.

Yvonne de Carlo in her most famous role as Lily Munster

In a study of 443 women, a pair of British researchers discovered that women were more likely to make impulsive purchases during the weeks between ovulation and menstruation, known as the luteal phase of the menstrual cycle.Here’s the study

Now let’s look a little deeper into the action of those neurotransmitters [dopamine and oxytocin] and how we can manipulate their action to extend the neurological orgasm for as long as possible.

A device for accurate breast volume measurements

William Saletan on anal sex

Angus McLaren, an academic explorer of the history of sexuality

A woman’s race/ethnicity and socioeconomic status impact whether health care providers recommend one of the most highly effective forms of contraception.

On Carl Djerassi, inventor of the pill

Vogue‘s first celebrity models

Alexander Lee’s ‘Short History of Desire

A list of abortions in literature

More about the trial of Lady Chatterley’s Lover

Depicting the harem as a home rather than as a sexual prison, books written by women from the progressive elite of late Ottoman society challenged the prevailing stereotype of harem women as ignorant, indolent odalisques whiling away their days awaiting their lord and master.

Ida Rubinstein in Scheherazade (1910) .jpeg by M. Evans & Theatrex

Male bonobos need their mommies to help them hook up with female bonobos

The male [chimpanzee] will pluck a leaf, or a set of leaves, and sit so the female can see him. He spreads his legs so the female sees the erection, and he tears the leaf bit by bit … dropping the pieces as he detaches them. Sometimes he’ll do half a dozen leaves until she notices. … [S]he sees the erection and puts two and two together, and if she’s interested, she’ll typically approach and present her back side, and then they’ll mate.

Exposure to a chemical found in food packaging and other plastics, BPA, can reduce the quality of men’s semenMore here

A non-stick coating for a substance found in semen dramatically lowers the rate of infection of immune cells by HIV

Female boa constrictors can reproduce without mating: “Large litters of all-female babies produced by the “super mom” boa constrictor show absolutely no male influence — no genetic fingerprint that a male was involved in the reproductive process.

But there is an interesting property of sea squirt pornography and local oceanography that may have consequences in the debates surrounding marine reserve design.

The Ladybirds: the world’s first and only all-girl topless band‘; more here.

Freud, penile trauma, and the art of porn

Gia Carangi

Gia Carangi, a causualty of the 80′s drug culture

A short history of sex art

A 1996 article by Jon Stratton on the history of the idea of sex dolls

Porn for the Blind — “You can help. Record a description now.”

Cell phones, sitting around a lot, and not watching the right kind of porn leads to inferior sperm quality

For those who object to the rise of pornography studies as an academic subfield or balk at paying astronomical tuition so their kids can watch people boink on-screen for course credit, Linda Williams is the one to blame. Her landmark 1989 study Hard Core: Power, Pleasure, and the “Frenzy of the Visible” was the first book to take porn seriously as a film genre.

Dave Monroe of St. Petersburg College (Florida) has edited an anthology called Porn — Philosophy for Everyone: How to Think With Kink

The internet has changd the way porn writers depict sex. How one man nearly became a scribe of smut.

Oodles of stats on internet porn, including the nations with the highest porn revenues

As long as there is a stimulus-response cued reaction, your brain could care less if it was induced by a steamy night with a Russian supermodel, or by looking through the Victoria’s Secret catalog. Dopamine and oxytocin aren’t snobby that way.” (with a neat Helmut Newton pic)

Ordering sex in cyberspace: a content analysis of escort websites

In a study of tamarin monkeys, “Partners with a high level of oxytocin performed correspondingly more cuddling, grooming and sex, while those with low levels of oxytocin spent less time on these relationship-building activities.”

Infidelity punishment meted out by female salamanders

New and improved Oedipal theory, now with autosexuality: “You are sexually attracted to Your Parents, and Yourself

Oedipal theory confirmed in rats back in the 80′s

From the Freud Museum, London

The Freud Family (c. 1878), with Sigmund standing behind his mother, his back to his dad (who should be more worried by the guy with the sword)

Bering on Oediups 2.0, now with fetishes

‘“Simply put,” [James V. Kohl] concedes “pheromones don’t create desire, they merely enhance it. If you’re not desirable to start with, because your personality is disagreeable, you’re not going to get lucky by using pheromones.”’ I’d like to put that to the test.

A youth forensic psych unit in British Columbia discontinues its use of penile plethysmography, the ‘peter meter’

Are there different types of female orgasm? They’ve been debating this for eons. How hard can it be to figure out?

Sex disappears from the British novel

But not from the lives of British(-Norwegian) novelists — ‘How “drop dead gorgeous” Roald Dahl slept with countless women while working as a spy’

Not only were females who were having sex without condoms less depressed, but depressive symptoms and suicide attempts among females who used condoms were proportional to the consistency of condom use. … These data are consistent with the possibility that semen may antagonize depressive symptoms.’

Sex reduces anxiety-like behavior in rats

Sex makes you smarter — it promotes neuronal growth

The injury is defined as the traumatic rupture of the corpus cavernosum secondary to a blunt trauma of the erect penis. The condition is underreported. The commonest causes were coital injuries and penile manipulation. The diagnosis was usually fairly straightforward because of the stereotypical clinical presentation. Associated injuries included urethral rupture.’

Evaluation and management of gunshot wounds to the penis may potentially be complex. Retrograde urethrogram should be performed in all cases except the most insignificant and superficial wounds. We describe our technique of penile exploration and artificial erection, noting excellent results in patients for whom follow-up is available.’

Waist-hip ratios, Neanderthals & spider sex

Ratio unspecified

The NY Times on a study showing that blind men, like men generally, are more attracted to women with a lower waist-to-hip ratio, indicating that this preference is not a result of visual media images (ht Mind Hacks)

Rutgers lab uses brain imaging to study female orgasm: “Dr. Barry Komisaruk selects volunteers to self-stimulate inside an fMRI machine so he and his team can study which areas of the brain … are activated by arousal.”

Differences between male & female brains

Simon Baron-Cohen on why biological differences between the sexes don’t support sexist stereotyping

Oxytocin makes men more sensitive

A Connecticut obstetrician-gynecologist who specialized in fertility treatments, opted to inseminate a patient with his own sperm, unbeknownst to the woman or her husband

Finkel and Eastwick speculated that in speed dating, physically approaching someone might be enough to make the potential date more appealing romantically—and thus, because men usually approach women in such events, to make the men less choosy overall

Why humans have sex

Yoko Ogawa’s Hotel Iris reviewed

A classic about cougars: the re-issue of Stephen Vizinczey’s In Praise of Older Women


‘Paraphilias Across Modern Cultures’: “Cultures define and describe what is normal and what is deviant” [doesn't biology contribute something on that score?]

Modern humans got it on with Neanderthals (or did they?)

The evolution of Raquel Welch

Porn star with a heart of gold– Lupe Fuentes flies to US to testify in court on behalf of a fan

Virginie Despentes on the power of porn stars

Porn makers on the cutting edge of techy computer stuff

A new study [of] … the erotic photographic shoot has been completed by two Canadian researchers

From an exhibit in Hamburg called ‘Nude Visions — 150 Years of Nude Photography‘:

http://www.thelocal.de/gallery/culture/817/15/

'Pulling on stockings' ca. 1855

We hypothesized that female choice is largely based on a courtship duration threshold in the Australian redback spider (Latrodectus hasselti) because females kill males before copulation is complete (premature cannibalism) and reduce their paternity if courtship is brief.

How male wasp spiders try to avoid being devoured by their siblings

Mature Argiope bruennichi [a type of spider] females are always receptive and never attack or reject males before mating, although sexual cannibalism after mating occurs regularly. Still, males usually perform an energetic vibratory display prior to copulation.

Belle, Veruschka, etc.

Veruschka

Belle de Jour is a scientist studying “developmental neurotoxicology and cancer epidemiology.”

She was petite, slight yet buxom, casually dressed with a blonde ponytail, with a subtle voltage and air of complexity that would clearly make her attractive to men. Above all, she was very smart indeed – always the mark of the born courtesan – and a gifted, witty writer.” A UK blogger tipped her off to the fact that a tabloid was about to out her.

The Apprenticeship of Big Toe reviewed

Pre-modern sex was more slippery

Female sex orientation taken in at a glance

ht Queerest of Them All's tumblr

Masturbation experiments reveal the role of oxytocin

Veruschka (aka Countess Vera Gottliebe Anna von Lehndorff) was one hot model, the first super-model, with a fascinating family background