Exposure of hyperthermophilic archaeal Sulfolobus species to DNA damaging conditions induces cellular aggregation accompanied by high frequency genetic marker exchange.[32][33] Ajon et al.[33] hypothesized that this cellular aggregation enhances species-specific DNA repair by homologous recombination. DNA transfer in Sulfolobus may be an early form of sexual interaction similar to the more well-studied bacterial transformation systems that also involve species-specific DNA transfer leading to homologous recombinational repair of DNA damage.

1650s, "of or pertaining to the fact of being male or female," from Late Latin sexualis "relating to sex," from Latin sexus (see sex (n.)). Meaning "pertaining to copulation or generation" is from 1766; sexual intercourse attested by 1778; sexual orientation by 1967; sexual harassment by 1975. Sexual revolution attested by 1962. Sexual politics is from 1970. Related: Sexually.

The bryophytes, which include liverworts, hornworts and mosses, reproduce both sexually and vegetatively. They are small plants found growing in moist locations and like ferns, have motile sperm with flagella and need water to facilitate sexual reproduction. These plants start as a haploid spore that grows into the dominate form, which is a multicellular haploid body with leaf-like structures that photosynthesize. Haploid gametes are produced in antherida and archegonia by mitosis. The sperm released from the antherida respond to chemicals released by ripe archegonia and swim to them in a film of water and fertilize the egg cells thus producing a zygote. The zygote divides by mitotic division and grows into a sporophyte that is diploid. The multicellular diploid sporophyte produces structures called spore capsules, which are connected by seta to the archegonia. The spore capsules produce spores by meiosis, when ripe the capsules burst open and the spores are released. Bryophytes show considerable variation in their breeding structures and the above is a basic outline. Also in some species each plant is one sex while other species produce both sexes on the same plant.[27]

This brings us to fertility-challenged Japan, which is in the midst of a demographic crisis and has become something of a case study in the dangers of sexlessness. In 2005, a third of Japanese single people ages 18 to 34 were virgins; by 2015, 43 percent of people in this age group were, and the share who said they did not intend to get married had risen too. (Not that marriage was any guarantee of sexual frequency: A related survey found that 47 percent of married people hadn’t had sex in at least a month.)
Let’s consider this lure for a moment. Japan is among the world’s top producers and consumers of porn, and the originator of whole new porn genres, such as bukkake (don’t ask). It is also a global leader in the design of high-end sex dolls. What may be more telling, though, is the extent to which Japan is inventing modes of genital stimulation that no longer bother to evoke old-fashioned sex, by which I mean sex involving more than one person. A recent article in The Economist, titled “Japan’s Sex Industry Is Becoming Less Sexual,” described onakura shops, where men pay to masturbate while female employees watch, and explained that because many younger people see the very idea of intercourse as mendokusai—tiresome—“services that make masturbation more enjoyable are booming.”
In more recent decades, by contrast, teen romantic relationships appear to have grown less common. In 1995, the large longitudinal study known as “Add Health” found that 66 percent of 17-year-old men and 74 percent of 17-year-old women had experienced “a special romantic relationship” in the past 18 months. In 2014, when the Pew Research Center asked 17-year-olds whether they had “ever dated, hooked up with or otherwise had a romantic relationship with another person”—seemingly a broader category than the earlier one—only 46 percent said yes.
Plus, the new versions are sexier, sleeker, and considerably more wearable—even in the dead of winter. — Janelle Okwodu, Vogue, "Beyoncé Revives a Forgotten ’90s Trend," 31 Jan. 2019 That’s unknown but having what amounts to a third player in sound cards can only be good for PC audio ,which has always played second fiddle to sexier graphics cards, CPUs, and even storage. — Gordon Mah Ung, PCWorld, "EVGA gets into sound cards with Nu Audio, a high-end board that delivers 'lifelike' gaming," 8 Jan. 2019 The gorgeous couple was undoubtedly the sexiest at the Golden Globes tonight, setting the bar high for all other twosomes who will follow them this award season. — Vogue, "Bradley Cooper and Irina Shayk Win Sexiest Red Carpet Couple at the Golden Globes," 7 Jan. 2019 Winter's sexier, off-the-shoulder black dress is something Hyland's character, Haley, would wear on the show whereas Hyland's sweater and skirt ensemble is something Winter's character, Alex, would wear. — Fox News, "'Modern Family' star Ariel Winter defended by fans after troll slams her 'sexy' style," 30 Aug. 2018 Three years ago celebrities were tripping over themselves to appear the sexiest on Instagram. — Christopher Rosa, Glamour, "Are Marriage and Babies the New Naked Selfie?," 27 July 2018 And journals publishing only the sexiest, flashiest findings, while turning their noses up at sensible incremental work, help to skew the scientific record. — Cathleen O'grady, Ars Technica, "Social science has a complicated, infinitely tricky replication crisis," 28 Aug. 2018 There was a sexiest selfies thing from one of the publishers. — Eric Johnson, Recode, "Taking a page from YouTube, Snap VP Nick Bell wants to find the next generation of media stars," 25 Oct. 2018 The scent—a combo of light florals like jasmine, salted caramel, and pistachio—is probably the sexiest thing ever, and the butter provides a thick coating of hydrating moisturizers to leave my normally dry skin soft for hours on end. — Rachel Jacoby Zoldan, SELF, "This Foot Cream Is Actually the Best Hand Cream of All Time," 12 Oct. 2018
Some of Herbenick’s most sobering research concerns the prevalence of painful sex. In 2012, 30 percent of women said they’d experienced pain the last time they’d had vaginal intercourse; during anal intercourse, 72 percent had. Whether or not these rates represent an increase (we have no basis for comparison), they are troublingly high. Moreover, most women don’t tell their partners about their pain. J. Dennis Fortenberry, the chief of adolescent medicine at Indiana University’s medical school and a co-leader of the NSSHB, believes that many girls and women have internalized the idea that physical discomfort goes with being female.
The song was a commercial success in the United Kingdom and Australia. On the UK Singles Chart dated 8 September 2016, the song debuted at number 83. Eight weeks later, on the chart dated 3 November 2016, the song rose to number 6, becoming Neiked's first top ten hit, and Dyo's fifth.[12] On its fifteen week on the chart, dated 15 December 2016, the song moved to number five, becoming Dyo's fourth top five hit.[13] On the Australian Singles Chart dated 6 November 2016, "Sexual" debuted at number 33. On the chart dated 21 November 2016, it rose to number four, where it peaked.[14]
The authors conclude that the male baboons’ behavior amounts to sexual intimidation. — Michael Price, Science | AAAS, "Are some primates wired for sexual harassment?," 6 July 2017 Real freedom for women, Salt-N-Pepa are saying, lies in sexual autonomy, in taking control of their bodies. — Dinitia Smith, Daily Intelligencer, "Straight Outta Queens," 30 June 2017 Former president Steve Penny resigned in March under intensifying pressure for the way the organization handled charges of sexual abuse. — Will Graves, chicagotribune.com, "USA Gymnastics needs ‘culture change’ to stop abuse: review," 27 June 2017
In most birds, both excretion and reproduction is done through a single posterior opening, called the cloaca—male and female birds touch cloaca to transfer sperm, a process called "cloacal kissing".[30] In many other terrestrial animals, males use specialized sex organs to assist the transport of sperm—these male sex organs are called intromittent organs. In humans and other mammals this male organ is the penis, which enters the female reproductive tract (called the vagina) to achieve insemination—a process called sexual intercourse. The penis contains a tube through which semen (a fluid containing sperm) travels. In female mammals the vagina connects with the uterus, an organ which directly supports the development of a fertilized embryo within (a process called gestation).
We know 45 is a lot, but don't be intimidated. Treat this list like a menu. If you’re feeling limber, go ahead and give The Butter Churner a shot. If you don’t like it, move on down the list. Not every position is going to work for every couple. Just because the Wheelbarrow or Heir to the Throne aren't blowing your minds doesn't mean Gift Wrapped won't do the trick. There's something here for everyone. (If you do happen to stumble upon that magical alignment, find out what your favorite position says about you.)
The prostate gland and the seminal vesicles produce seminal fluid that is mixed with sperm to create semen.[8][page needed] The prostate gland lies under the bladder and in front of the rectum. It consists of two main zones: the inner zone that produces secretions to keep the lining of the male urethra moist and the outer zone that produces seminal fluids to facilitate the passage of semen.[23] The seminal vesicles secrete fructose for sperm activation and mobilization, prostaglandins to cause uterine contractions that aid movement through the uterus, and bases that help neutralize the acidity of the vagina. The Cowper's glands, or bulbourethral glands, are two pea sized structures beneath the prostate.
Anal sex is when an erect penis or other device made for sexual pleasure is inserted into the sexual partner's anus. Anal sex with a female does not lead to pregnancy by itself, however, semen can leak out of the anus and enter into the vagina, and pregnancy may rarely occur. Anal sex can still pass sexually transmitted diseases from one partner to another. It can also be very unhealthy for the body because the skin around the anus can tear, bleed and get infected with bacteria.[15] For safety and pleasure partners often use condoms, female condoms and/or lubrication.
Mueller’s full report has not been made available to the public yet, so it’s not clear whether it sets forth everything the special counsel’s office learned over the course of its nearly two-year investigation—including findings about conduct that was perhaps objectionable but not criminal—or whether it is more tailored and explains only Mueller’s prosecution and declination decisions. But national-security and intelligence experts tell me that Mueller’s decision not to charge Trump or his campaign team with a conspiracy is far from dispositive, and that the underlying evidence the special counsel amassed over two years could prove as useful as a conspiracy charge to understanding the full scope of Russia’s election interference in 2016.
The male gamete, a spermatozoon (produced in vertebrates within the testes), is a small cell containing a single long flagellum which propels it.[27] Spermatozoa are extremely reduced cells, lacking many cellular components that would be necessary for embryonic development. They are specialized for motility, seeking out an egg cell and fusing with it in a process called fertilization.

Boob jobs have been ubiquitous in American popular culture since the 1980s, when laws changed to allow plastic surgeons to advertise and credit cards became widely available. But safety concerns have dogged the procedure since the first silicone breast enhancements were successfully implanted by Texas surgeons in 1962. In that time, the Food and Drug Administration has banned the use of silicone implants and then reinstated them on the condition that the industry closely monitor their impact on patients.
Ian Kerner, the New York sex therapist, told me that he works with a lot of men who would like to perform oral sex but are rebuffed by their partner. “I know the stereotype is often that men are the ones who don’t want to perform it, but I find the reverse,” he said. “A lot of women will say when I’m talking to them privately, ‘I just can’t believe that a guy wants to be down there, likes to do that. It’s the ugliest part of my body.’ ” When I asked 20-somethings about oral sex, a pretty sizable minority of women sounded a similar note. “Receiving makes me nervous. It feels more intimate than penetration,” wrote one woman. “I become so self-conscious and find it difficult to enjoy,” wrote another.
As a 27-year-old woman in Philadelphia put it: “I have insecurities that make fun bar flirtation very stressful. I don’t like the Is he into me? moment. I use dating apps because I want it to be clear that this is a date and we are sexually interested in one another. If it doesn’t work out, fine, but there’s never a Is he asking me to hang as a friend or as a date? feeling.” Other people said they liked the fact that on an app, their first exchanges with a prospective date could play out via text rather than in a face-to-face or phone conversation, which had more potential to be awkward.
The evolution of sexual reproduction is a major puzzle because asexual reproduction should be able to outcompete it as every young organism created can bear its own young. This implies that an asexual population has an intrinsic capacity to grow more rapidly with each generation.[4] This 50% cost is a fitness disadvantage of sexual reproduction.[5] The two-fold cost of sex includes this cost and the fact that any organism can only pass on 50% of its own genes to its offspring. One definite advantage of sexual reproduction is that it impedes the accumulation of genetic mutations.[6]

Plus, the new versions are sexier, sleeker, and considerably more wearable—even in the dead of winter. — Janelle Okwodu, Vogue, "Beyoncé Revives a Forgotten ’90s Trend," 31 Jan. 2019 That’s unknown but having what amounts to a third player in sound cards can only be good for PC audio ,which has always played second fiddle to sexier graphics cards, CPUs, and even storage. — Gordon Mah Ung, PCWorld, "EVGA gets into sound cards with Nu Audio, a high-end board that delivers 'lifelike' gaming," 8 Jan. 2019 The gorgeous couple was undoubtedly the sexiest at the Golden Globes tonight, setting the bar high for all other twosomes who will follow them this award season. — Vogue, "Bradley Cooper and Irina Shayk Win Sexiest Red Carpet Couple at the Golden Globes," 7 Jan. 2019 Winter's sexier, off-the-shoulder black dress is something Hyland's character, Haley, would wear on the show whereas Hyland's sweater and skirt ensemble is something Winter's character, Alex, would wear. — Fox News, "'Modern Family' star Ariel Winter defended by fans after troll slams her 'sexy' style," 30 Aug. 2018 Three years ago celebrities were tripping over themselves to appear the sexiest on Instagram. — Christopher Rosa, Glamour, "Are Marriage and Babies the New Naked Selfie?," 27 July 2018 And journals publishing only the sexiest, flashiest findings, while turning their noses up at sensible incremental work, help to skew the scientific record. — Cathleen O'grady, Ars Technica, "Social science has a complicated, infinitely tricky replication crisis," 28 Aug. 2018 There was a sexiest selfies thing from one of the publishers. — Eric Johnson, Recode, "Taking a page from YouTube, Snap VP Nick Bell wants to find the next generation of media stars," 25 Oct. 2018 The scent—a combo of light florals like jasmine, salted caramel, and pistachio—is probably the sexiest thing ever, and the butter provides a thick coating of hydrating moisturizers to leave my normally dry skin soft for hours on end. — Rachel Jacoby Zoldan, SELF, "This Foot Cream Is Actually the Best Hand Cream of All Time," 12 Oct. 2018
My wife and I, both professionals about 15 years behind the real RBG, found this movie both fascinating and painful--almost as painful as the negative reviews that object to the Subject on the basis not of sex, but of politics. Too bad the knuckle-draggers can't get past their own biases to enjoy this very good and intellectually engaging movie. And yes, we did find it suspenceful. My wife, too got directed to the typing pool after four years of college and three of grad school, and I hope I was half as supportive as Marty. We thoroughly enjoyed this reminder that even today the arc of history doesn't bend itself, and that the only way to achieve your goals, especially (gasp) equality, is to keep pushing. And we thought the acting was first-rate, and loved the physical mismatch of the tiny Jones and towering Hammer.
Over the past few years, Jean M. Twenge, a psychology professor at San Diego State University, has published research exploring how and why Americans’ sex lives may be ebbing. In a series of journal articles and in her latest book, iGen, she notes that today’s young adults are on track to have fewer sex partners than members of the two preceding generations. People now in their early 20s are two and a half times as likely to be abstinent as Gen Xers were at that age; 15 percent report having had no sex since they reached adulthood.

Desire is part biology, part psychology, often as subtle as it is predictable, and takes shape differently in men and women. For men, arousal typically precedes desire. But for women, desire precedes arousal, in response to physical intimacy, emotional connection, and an atmosphere free of distractions and everyday concerns. Scientists are continuously exploring the interplay of biological influences, such as neurohormones that suppress or enhance desire, and psychological influences, such as emotions and relationships. Smell plays an often subtle role in attraction; research shows that women are attracted to mates whose natural body odor (sometimes referred to as pheromones) signals a genetic profile distinct from their own. Low sexual desire is a common occurrence, among both sexes, and often it can be resolved by regularly exchanging affection and conversation outside the bedroom as well as in it, making sufficient time for each other and for sex, and addressing conflicts within a relationship.
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