sex-oriented

And shall not Babel be with Lebab?

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Sex in reptiles and fish is determined after conception, during embryogenesis, according to ambient environmental temperature. In contrast, in mammals and birds, sex is determined at conception.

In mammals, male births invariably occur slightly in excess […] with approximately 3% more males born than females. The reason for this discrepancy is uncertain as testicles produce equal numbers of X-bearing and Y-bearing spermatozoa. […]

We have shown that M/F varies in geographical space, exhibiting a latitude gradient, and that this gradient is different in Europe and North America, with more males born towards the south of Europe, compared with the North American continent where more males are born towards the north of the continent.

Other studies have also shown that M/F may vary with time. Several authors have shown that M/F has declined over the second half of the 20th century in various industrialised countries. These include Denmark, the United Kingdom, the Netherlands, Germany, Canada, the United States of America, and Finland. In contrast, M/F has been noted to have risen in Ireland over the same period. A non-significant rise in M/F has also been noted in Australia and Japan.

{ J Epidemiol Community Health | Continue reading }

A wide variety of factors have been shown to influence the male to female ratio at birth, which invariably displays a male excess. […] It will be shown that stress, including stress related to political events, influences this ratio.

{ Early Human Development | Continue reading }

related { Study: ”Woman on top” is the most dangerous sex position, responsible for half of all penile fractures }

‘I want to tell young women that sex is OK.’ –Sasha Grey

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In an earlier experimental study by Zillman and Bryant (1988) male and female students were exposed to pornography once a week for six weeks. Those who viewed pornography reported being less satisfied with their partner’s appearance and sexual behavior. They also found that men who consumed pornography were more dominating and less attentive toward their partners. Hence, there is some reason to anticipate that pornography consumption impairs relationship commitment.

Other research suggests that pornography may be beneficial to relationships in some ways, especially in sexual relations. Some evidence suggests that consuming pornography influences individuals’ positive attitude toward sexuality and serves as a safe platform through which to en- gage in sexual exploration. […]

Using a variety of methods, we demonstrated that pornography consumption is associated with weakened commitment to one’s relationship partner. […] in Study 5 we examined a more extreme implication of the weakened commitment—infidelity. We found that pornography consumption corresponded to decreased commitment, which, in turn related to higher levels of infidelity.

{ Journal of Social and Clinical Psychology | PDF }

Do sea dragons exist?

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During sexual stimulation, some women report the discharge of a noticeable amount of fluid from the urethra, a phenomenon also called “squirting.” To date, both the nature and the origin of squirting remain controversial. In this investigation, we not only analyzed the biochemical nature of the emitted fluid, but also explored the presence of any pelvic liquid collection that could result from sexual arousal and explain a massive fluid emission. […]

The present data based on ultrasonographic bladder monitoring and biochemical analyses indicate that squirting is essentially the involuntary emission of urine during sexual activity, although a marginal contribution of prostatic secretions to the emitted fluid often exists.

{ The Journal of Sexual Medicine | Continue reading }

photo { Spot }

What do we mean by saying that existence precedes essence?

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You shoot a lot of BDSM stuff. How did you get into that scene?

One of my neighbors was heavy into it. I took a photo of my neighbor and she posted it on some website and a lot of people liked it. After that people started to want me to take their photos. They basically inducted me into the New York tribe of BDSM people. The induction was interesting. They invited me to this dude’s house and all the girls were on their knees as servants. Basically I had sex with this dude’s wife and this other dude’s girlfriend and then they said, “You’re an honorary member.”

[…]

What’s with the guy getting barbequed?


[…] The guy, Jim, gets off the plane from Texas in a white denim mini skirt and he’s all excited. The girls wash him down, shave all the hair off his body and strap him down to the spit and the barbequing begins. The basting took 40 minutes, then they lit the coals and he roasted on the spit for about three and half hours and got pretty cooked. When it was time to take him off he was yelling that he didn’t want to get off. He wanted to stay on there until his skin was legitimately burned.

{ Ian Reid interviewed by Chris Nieratko | Continue reading + BBQ video }

production still { Tsai Ming-liang, I Don’t Want to Sleep Alone, 2006 }

The rise of men who don’t work, and what they do instead

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‘Ce sceptre de Vénus, que tu vois sous tes yeux, Eugénie, est le premier agent des plaisirs en amour : on le nomme membre par excellence ; il n’est pas une seule partie du corps humain dans lequel il ne s’introduise.’ –Sade

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Based on a survey of heterosexual female college students in committed relationships, how often women experienced orgasm as a result of sexual intercourse was related to their partner’s family income, his self-confidence, and how attractive he was. […]

We also identified an ensemble of partner psychological traits (motivation, intelligence, focus, and determination) that predicted how often women initiated sexual intercourse. Their partner’s sense of humor not only predicted his self-confidence and family income, but it also predicted women’s propensity to initiate sex, how often they had sex, and it enhanced their orgasm frequency in comparison with other partners.

{ Evolution Psychology | PDF }

photo { William Eggleston }

related { Guy Ends Up In Hospital After Getting Girlfriend’s Strap-On Stuck Up His Bum }

‘Your daughter and the Moor are now making the beast with two backs.’ –Iago (Othello, Act I, Scene i)

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In species where females mate with multiple males, the sperm from these males must compete to fertilise available ova. Sexual selection from sperm competition is expected to favor opposing adaptations in males that function either in the avoidance of sperm competition (by guarding females from rival males) or in the engagement in sperm competition (by increased expenditure on the ejaculate). […]

We found that men who performed fewer mate guarding behaviors produced higher quality ejaculates, having a greater concentration of sperm, a higher percentage of motile sperm and sperm that swam faster and less erratically.

{ PLoS | Continue reading }

related { Britain’s sperm shortage - and the man who helps two women a month | via gettingsome }

‘Retenez ceci : il n’y a de bon, de vrai, de gai, de triste, d’aimable, de variable, de désirable, de potable, de chantable, de célébrable, d’idolâtrable, que le delta qui existe depuis la ceinture d’une femme jusqu’à ses jarretières.’ –George Sand & Alfred de Musset

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Pham and Schackelford (2013) argued that men with more attractive partners are at a greater recurrent risk of sperm competition because other men are more likely to woo them into having affairs. Therefore, men with more attractive partners have more reason to be concerned about and more likely to engage in behaviour aimed to detect infidelity. The idea that cunnilingus, oral sex performed on a woman, could function to detect infidelity was proposed in a 2006 book, but this study is the first to test this empirically. The idea is that oral sex may allow a man to detect the presence of another man’s semen through smell or taste. […]

As side-note I’d like to point out that there is a common misconception often advanced by its critics that evolutionary psychology assumes that everything that people do is somehow an evolutionary adaptation and that evolutionary psychologists cannot or will not acknowledge that some behaviours are simply by-products of other adaptations with no special function of their own. This is a gross misrepresentation of what evolutionary psychology is about and in fairness to the authors of the study they were attempting to actually test whether or not their hypothesis about the adaptive function of oral sex is valid, rather than just assuming it is. It is quite possible that oral sex has no evolutionary function in itself. Humans are a highly sexed species compared to most mammals and engage in many non-procreative sexual acts, perhaps for pleasure alone. Oral sex might simply be a by-product of this interest in sex that humans have. However, if it can be shown that this particular behaviour appears to serve a definite purpose that has an evolutionary history, a reasonable case can be made that it has an adaptive function. […]

They found that “recurrent risk of sperm competition” (attractiveness) predicted interest in performing oral sex independently of relationship length, relationship satisfaction, and duration of intercourse.

{ Psychology Today | Continue reading }

‘No sunshine, no moonlight, no stardust, no sign of romance.’ —Barbra Streisand

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Religiosity delays initiation of sexual behavior, but the association may be bidirectional, and individuals may become less religious after first intercourse.

This study uses longitudinal data from college students to examine whether 2 aspects of religiosity change before and after first intercourse using multiphase growth curve models.

Students’ religiosity did not change in the 6 months preceding first intercourse, but on average they attended services less often and felt religion was less important in the 12 months after first intercourse.

{ APA PsycNet }

related { Attributions to God and Satan About Life-Altering Events }

photo { Lionat Natalia Petri }

Terrorwrist

Man dies at sperm bank after 4th donation in 10 days

‘Science does not think.’ —Heidegger

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The main objective of this study was to describe male and female lumbar spine and hip motion and muscle activation patterns during coitus and compare these motions and muscle activity across five common coital positions. […]

A secondary objective was to determine if simulated coitus could be used in place of real coitus for future coitus biomechanics research.

{ via University of Waterloo | PDF }

‘I was not yet in love, yet I loved to love.’ —Augustine of Hippo

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There is no point faking it in bed because chances are your sexual partner will be able to tell. A study by researchers at the University of Waterloo found that men and women are equally perceptive of their partners’ levels of sexual satisfaction. […]

Couples in a sexual relationship develop what psychologists call a sexual script, which forms guidelines for their sexual activity. “Over time, a couple will develop sexual routines,” said Fallis. “We believe that having the ability to accurately gauge each other’s sexual satisfaction will help partners to develop sexual scripts that they both enjoy. Specifically, being able to tell if their partners are sexually satisfied will help people decide whether to stick with a current routine or try something new.”

{ University of Waterloo | Continue reading }