Action intercourse sexual visuals-Human sexual intercourse

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See also: Human mating strategies and Pair bond. I feel like am on it already. How would it feel to you if you could give her the best sex of her Menstrual cycle questions Ovum Oviposition Oviparity Ovoviviparity Vivipary. Go back to kissing her, biting her ear, grabbing the back Action intercourse sexual visuals her head, and of courseā€¦ remove another piece of clothing. Now what we want to do is to massage all around her vulva, as indicated by the grey circle in the picture below EXCEPT the clitoris area red rectangle :. The human sexual response is a dynamic combination of cognitive, emotional, and visals processes.

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Here's what you're missing out on! Sex pictures. We offer streaming porn videos, downloadable DVDs, Action intercourse sexual visuals albums, and the number 1 free sex community on the net. Penile vaginal intercourse. All Professional Homemade. Dad and Daughters beach intercourse 8 min Tradingdaughters - 3. Login or sign up. Ebony Nyomi enjoys having her pussy filled with cum. Vaginismusis involuntary tensing of the pelvic floor musculature,making coitus distressing or impossible. Sexually transmitted diseases STD -Sexual intercourse, like other sexual activities thatinvolve the possibility of transfer of body fluids, is also ameans of propagating sexually transmitted diseases. Embed Size px. Most Relevant.

For almost a decade, researchers at Pfizer struggled to show that Viagra, the male impotence drug, could enhance sexual function in women.

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You can change your ad preferences anytime. Human sexual intercourse. Upcoming SlideShare. Like this presentation? Why not share! Embed Size px. Start on. Show related SlideShares at end. WordPress Shortcode. Full Name Comment goes here. Are you sure you want to Yes No. Bridget Stephenson This new site crushes dating! An eBook reader can be a software application for use on a computer such as Microsoft's free Reader application, or a book-sized computer that is used solely as a reading device such as Nuvomedia's Rocket eBook.

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Show More. Ajik Izang Magaji. Umend Karsh. Sujeesh K Nair. Abadi Yohannes. No Downloads. Views Total views. Actions Shares. Embeds 0 No embeds. No notes for slide. Human sexual intercourse 1. Physiology ofHuman Sexual Intercourse 2. The terms "sexual intercourse" and "coitus" are used inreference to people. The term for the higher vertebratesand some other animals is "copulation".

Many highervertebrates animals reptiles, birds. The Act of Sexual Intercourse-Sexual intercourse is usually preceded byforeplay which leads to sexual arousal ofthe partners, resulting in erection of thepenis and natural lubrication of the vagina.

The erect penis is inserted into the vaginaand one or both of the partners move backand forth to stimulate themselves and eachother usually to the point of ejaculation andorgasm.

Sexual intercourse: Biology of conception-Coitus is the basic reproductive method of Homo sapiens as of allmammals. During ejaculation, which normally accompanies themale orgasm, a series of muscular contractions delivers semencontaining male gametes known as sperm cells or spermatozoa intothe vault of the vagina. The subsequent route of the sperm from thevault of the vagina, is through the cervix and into the uterus, andthence into the fallopian tubes. When a fertile ovum from the femaleis present in the fallopian tubes, the male gamete joins with theovum resulting in fertilization and the formation of a new embryo.

When a fertilized ovum reaches the uterus, it becomes implanted inthe lining of the uterus and pregnancy begins. Sexual intercourse should always be considered likelyto result in pregnancy unless adequate contraceptive birth control measures are in force. Outercourse, in which there is sexualactivity without insertion, can be performed withoutresulting in pregnancy provided that semen does notcome in contact with the vulva.

Problems of intercourse-Many males suffer from erectile dysfunction, orimpotence, at least occasionally. Some men also havedysfunction with orgasm in intercourse, calledanorgasmia. Anorgasmia is much more common inwomen, however, and usually needs attention from bothpartners over a long time span to solve. Many women,especially younger women and women with relativelylittle sexual experience, experience difficulty achievingorgasm or may be unable to achieve orgasm.

Vaginismusis involuntary tensing of the pelvic floor musculature,making coitus distressing or impossible. Dyspareunia ispainful or uncomfortable intercourse; it can be due to avariety of reasons. Sexually transmitted diseases STD -Sexual intercourse, like other sexual activities thatinvolve the possibility of transfer of body fluids, is also ameans of propagating sexually transmitted diseases. Health care professionals suggest that condoms should beused to lessen the risk of contracting STDs, but theyshould by no means be considered an absolute safeguard.

The best suggestion is to avoid sexual intercourse withanyone known to have a sexually transmissible disease,and, indeed, with anyone whose disease-negative status isin doubt. Sexual intercourse:Morality and legality-Various laws, moral rules and taboos surround sexualintercourse. Unlike some other sexual activities, sexualintercourse itself has rarely been made taboo on religiousgrounds or by government authorities. It is believed that allof the cultures that prohibited sexual intercourse entirelyno longer exist, save the Shakers, a sect of Christianity,which has very few adherents.

Within some ideologies,coitus has been considered the only "acceptable" sexualactivity. Relatively strict designations of "appropriate" and"inappropriate" sexual intercourse have been almostuniversal in human societies. Most countries have age of consent laws specifying theminimum legal age for engaging in sexual intercourse.

Sexual intercourse with a person against their will, orwithout their informed consent informed legal consent, iscalled rape and is considered a serious criminal law crimein most cultures. Birth Control What is birth control? It allowsyou to choose whether or when to have a child. Most women can become pregnant from theage when they start their menstrual periodsuntil their late 40s or early 50s. During themany years before menopause, using birthcontrol is key to avoiding an unplannedpregnancy.

Which birth control methodshould I use? Each has itsown pros and cons. Learningabout all the methods will helpyou find the one that is right foryou.

Available methods include: -Hormonal methods such as the birth control pill "thePill" , shot, skin patch, and vaginal ring. Theintrauterine device IUD contains a hormone. Hormonebirth control works very well. It prevents pregnancy bystopping monthly egg production. It can also relieveheavy periods and cramping. An IUD is placed in theuterus through the vagina and cervix.

The IUDinterferes with a sperm as it tries to reach and fertilizean egg. It can also stop a fertilized egg from implantingand growing into an embryo. IUDs work very well for 5to 10 years at a time, and are far safer than they weredecades ago. The hormonal IUD can also help withheavy periods and cramping. In general,barrier methods are less effective than IUDs or hormonalmethods. To make a barrier work as well as possible, you use itwith a spermicide.

This kills any sperm that get past the barrier,before they can travel through the cervix. Unless you know thatyour sexual partner does not have any sexually transmitteddiseases STDs , use a condom every time you have sex.

Natural family planning can work well if you and your partner arevery careful. However, do not use fertility awareness if you need highlydependable pregnancy prevention. First, you pinpoint your fertile times of themonth. This means charting your bodys "fertile" signs and your basal bodytemperature daily for at least 2 months. On fertile days, you must not havesex or you must use a birth control method. If you are a sexually active teenor are not able to predict when you are fertile, you cannot count on fertilityawareness to prevent pregnancy.

On rare occasion, vasectomyor tubal ligation does fail to preventpregnancy. However, it is only a goodoption if you are absolutely sure that youwill never want to conceive a pregnancy.

LifestyleWhen choosing a method, first consider how well it worksand whether it fits your lifestyle. For example, if you are asingle woman who has no plans to raise a child on yourown, you will want to use a highly effective birth controlmethod. Future fertilityWhen deciding about birth control, think about how soon, ifever, you would like to start a family.

Remember me on this computer not recommended on public or shared computers. If you are a sexually active teenor are not able to predict when you are fertile, you cannot count on fertilityawareness to prevent pregnancy. This page was last edited on 21 July , at Sex 3. We're always working towards adding more features that will keep your love for porno alive and well.

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Sexual stimulation - Wikipedia

For almost a decade, researchers at Pfizer struggled to show that Viagra, the male impotence drug, could enhance sexual function in women. Countless tests on thousands of women made it clear that the little blue pill, though able to stir arousal, did not always evoke sexual desire.

Viagra's failure underscored the obvious: when it comes to sexuality, men and women to some extent are differently tuned. For men, arousal and desire are often intertwined, while for women, the two are frequently distinct.

Scientists have recently begun to map out how this difference shows up in the brain. For example, male arousal, studies find, is strongly visual, and when men engage in sexual activity or even anticipate it, brain structures once thought to have little connection to sex spring into action.

The same brain regions, however, remain relatively quiet when women are aroused. At the core of the sexual divide, some researchers say, is the amygdala, an almond-shaped nugget embedded in the limbic system, the brain's seat of emotions. Once thought to be involved exclusively with emotions like fear and anger, the amygdala is now believed to be more complicated.

In one recent study, a team of researchers at Emory University had 28 men and women look at erotic photographs while an M. A pattern immediately emerged. The photographs set off a frenzy of brain activity, particularly in the amygdalae of men.

Yet the two groups reported equal arousal most of the time. Stephan Hamann, a professor of psychology and the lead author of the study, which was published online by Nature Neuroscience last week and is scheduled to appear in the journal in April. Much of the insight into the amygdala's role in anticipating sex, and possibly other pleasant emotions, stems from research on animals.

In a study in , scientists trained caged male rats to gain access to females by pushing a lever. The researchers then destroyed part of the amygdala. The rats lost interest in pressing the lever. Yet despite this lack of motivation, they had no problem engaging in sexual intercourse when the females were placed in their cages. Other studies have gone further. In a study published last year, researchers in the Netherlands recorded brain activity in men as their female partners brought them to orgasm.

The amygdala, the scientists found, showed decreased activity during climax. Other studies have suggested that a larger amygdala may lead to a more robust sex drive. Hamann pointed out that the amygdala is known to have intricate connections to primates' visual systems. One reason for the powerful response to visual stimuli in men, he said, could be cultural.

Men tend to be inundated with sexual imagery and, possibly, are more likely to seek it out. Evolution may also have a role. Some experts argue that, over time, men naturally became more dependent than women on sight in selecting a mate.

Fisher has studied the brains of people in the early stages of romance. For a man, she found, pictures of a new partner light up parts of the brain involved in visual processing and arousal.

But women, she noticed, show more activity in areas linked to reward, emotion and attention. Fisher said. Women, on the other hand, may be more attuned to the signs that a man will make a good father or provider, she added, though some other researchers find this assertion dubious. A woman's choice of a mate, Dr.

Fisher argues, could involve an interplay among a number of factors, including, some experts now theorize, a man's odor. Several years ago, Swiss scientists discovered that women could sniff out genetic differences in potential mates.

When women were asked to smell T-shirts that different men had worn, they often ranked more favorably the shirts that belonged to men with dissimilar genes for major histocompatibility complex, a group of proteins involved in immunity to disease.

The odors a woman preferred also tended to remind her of past and current partners. Seeking out different immune-system genes might be a way to prevent inbreeding or to arm offspring with a more versatile immune system, said Dr.

Rachel S. Herz, a psychologist at Brown who in a study in found that women ranked body odor above almost every other factor in attraction, except ''pleasantness. Herz said. And what is indicative of how healthy you are is your immune system, which is manifested in your smell.

Yet to play down the role of visual stimulation for women would be unwise, researchers say, and female admirers of Brad Pitt or George Clooney would probably agree. In research last year at Northwestern, Dr. Meredith Chivers, demonstrated that women could sometimes have more powerful responses to visual stimuli than men, although in different ways.

In her study, which ignited a small firestorm, Dr. Chivers used a device to measure genital arousal in subjects as they looked at pornography. Heterosexual men, she found, were aroused by footage of men and women having sex.

Gay men reacted to two men having sex. Women, regardless of sexual orientation, responded to everything. In some cases, she said, women reported no sexual arousal, though the device said otherwise. What is apparently a disconnection between female arousal and desire, researchers note, squares nicely with the Pfizer findings on Viagra. Still, other experts point out that it is impossible to define neatly or predict how men and women will respond.

People's perceptions are colored by their personal experiences, said Dr. Leonore Tiefer, a sex therapist who is a clinical associate professor of psychiatry at the New York University medical school. Tiefer said. It is not the case that every person pays attention to the same thing. The whole experience is shaped by your history and by what you're paying attention to. Log In. Last month, they gave up.