Sexual intercourse or coitus or copulation is principally the insertion and thrusting of the penisusually when erectinto the vagina for sexual pleasurereproductionor both. There are different views on what constitutes sexual intercourse or other sexual activity  which can impact on views on sexual health.
Various jurisdictions have placed restrictive laws against certain sexual acts, such as incestsexual activity with minorsprostitutionrapezoophiliasodomypremarital and extramarital sex. Religious beliefs also play a role in personal decisions about sexual intercourse or other sexual activity, such as decisions about virginity  or legal and public policy matters. Religious views on sexuality "Sexual activities in human" significantly between different religions and sects of the same religion, though there are common themes, such as prohibition of adultery.
Reproductive sexual intercourse between non-human animals is more often called copulationand sperm may be introduced into the female's reproductive tract in non-vaginal ways among the animals, such by cloacal copulation. For most non-human mammalsmating and copulation occur at the point of estrus the most fertile period of time in the female's reproductive cyclewhich increases the chances of successful impregnation. Sexual intercourse may be called coituscopulationcoitionor intercourse the last of which is typically shorthand for sexual intercourse.
Coitus is derived from the Latin word coitio or coiremeaning "a coming together or joining together" or "to go together", and is Sexual activities in human under different ancient Latin names for a variety of sexual activities, but usually denotes penile—vaginal penetration. Although sexual intercourse and sex also most commonly denote penile—vaginal intercourse,  sex and the phrase "have sex" can be significantly broad in their meaning and may cover any penetrative or non-penetrative sexual activity between two or more people.
Vaginal, anal and oral sex are recognized as sexual intercourse more often than other sexual behaviors. Researchers commonly use sexual intercourse to Sexual activities in human penile—vaginal intercourse while using specific words, such as anal sex or oral sexfor other sexual behaviors. Lerner and Laurence Steinberg state that researchers also "rarely disclose" how they conceptualize sex "or even whether they resolved potential discrepancies" in conceptualizations of sex.
Studies regarding the meaning of sexual intercourse sometimes conflict. While most consider penile—vaginal intercourse to be sex, whether or not anal or oral intercourse is considered sex is more debatable, with oral sex ranking lowest.
Copulation ranges from a purely reproductive activity to one of emotional bonding. For example, sexual intercourse and sexual activity in general often play a strong role in human bonding.
In humans and bonobosthe female undergoes relatively concealed ovulation so that male and female partners commonly do not know whether she is fertile at any given moment. One possible reason for this distinct biological feature may be formation of strong emotional bonds between sexual partners important for social interactions and, in the case of humans, long-term partnership rather than immediate sexual reproduction.
The resulting cooperation encourages collective tasks that promote the survival of each member of the group. Sexual intercourse or other sexual activity can encompass various sexually stimulating factors physiological stimulation or psychological stimulationincluding different sex positions or the use of sex toys. In most mammals, the anatomy of the reproductive organs
Sexual activities in human some circuits of the nervous system are specifically organized for heterosexual copulation.
Copulation corresponds to a succession of innate sexual reflexes: These copulatory reflexes are controlled by hormones and facilitated by sexual pheromones. Non-primate females copulate only when in estrus but sexual intercourse is possible at any time of the menstrual cycle for women. During coitus, the partners orient their hips to allow the penis to move back and forth in the vagina to cause friction, typically without fully removing the penis.
In this way, they stimulate themselves and each other, often continuing until orgasm in either or both partners is achieved. Anal sex involves stimulation of the anusanal cavity, sphincter valve or rectum ; it most commonly means the insertion of a man's penis into another person's rectum, but may also mean the use of sex toys or fingers to penetrate the anus, or oral sex on the anus anilingusor pegging.
Oral sex consists of all the sexual activities that involve the use of the mouth and throat to stimulate genitalia or anus. It is sometimes performed to the exclusion of all other forms of sexual activity, and may include the ingestion or absorption of semen during fellatio or vaginal fluids cunnilingus.
Fingering or digital penetration or digital intercourse involves the manual manipulation of the clitoris, rest of the vulvavagina or anus for the purpose of sexual arousal and Sexual activities in human stimulation; it may constitute the entire sexual encounter or it may be part of mutual masturbation, foreplay or other sexual activities. Sexual intercourse is perhaps million years old, and it is likely that the oldest jawed fish on Earth was the first animal to reproduce by copulation.
The subsequent route of the sperm from the vault of the vagina is through the cervix and into the uterusSexual activities in human then into the fallopian tubes. Millions of sperm are present in each ejaculation, to increase the chances of one fertilizing an egg or ovum see sperm competition.
When a fertile ovum from the female is in the fallopian tubes, the male gamete joins with the ovum, resulting in fertilization and the formation of a new embryo. When a fertilized ovum reaches the uterus, it becomes implanted in the lining of the uterus the endometrium and a pregnancy begins.
Pregnancy rates for sexual intercourse are highest during the menstrual cycle time from some 5 days before until 1 Sexual activities in human 2 days after ovulation. When a sperm donor has sexual intercourse with a woman who is not his partner and for the sole purpose of impregnating the woman, this may be known as natural inseminationas opposed to artificial insemination.
Artificial insemination "Sexual activities in human" a form of assisted reproductive technologywhich are methods used to achieve pregnancy by artificial or partially artificial means.
Sexual activities in human gay male pairings, there is the option of surrogate pregnancy; for lesbian couples, there is donor insemination in addition to choosing surrogate pregnancy.
There are a variety of safe sex methods that are practiced by heterosexual and same-sex couples, including non-penetrative sex acts,   and heterosexual couples may use oral or anal sex or both as a means of birth control. Safe sex is a relevant harm reduction philosophy,   and condoms are used as a form of safe sex and contraception. Condoms are widely recommended for the prevention of sexually transmitted infections STIs.
Decisions and options concerning birth control can be affected by cultural reasons, such as religion, gender roles or folklore. Penile—vaginal penetration is the most common form of sexual intercourse.
Regarding oral or anal intercourse, the CDC stated in"Studies indicate that oral sex is commonly practiced by sexually active male-female and same-gender couples of various ages, including adolescents. The prevalence of sexual intercourse has been compared cross-culturally. In the second group, the data indicated families encouraged daughters to delay marriage, and to abstain from sexual activity before that time.
However, sons are encouraged to gain experience with older women or prostitutes before marriage. Age of men at sexual initiation in these societies is at lower ages than that of women; this group includes Latin cultures, both from southern Europe Portugal, Greece and Romania are noted and from Latin America Brazil, Chileand the Dominican Republic. The study considered many Asian societies to also fall into this group, although matching data was only available from Thailand. In the third group, age of men and women at sexual initiation was more closely matched; there were two sub-groups, however.
In non-Latin, Catholic countries Poland and Lithuania are mentionedage at sexual initiation was higher, suggesting later marriage and reciprocal valuing of male and female virginity.
The same pattern of late marriage and reciprocal valuing of virginity was reflected in Singapore and Sri Lanka. The study considered China and Vietnam to also fall into this group, though data were not available. Concerning United States data, tabulations by the National Center for Health Statistics report that the age of first sexual intercourse was In humans, sexual intercourse and sexual activity in general have been reported as having health benefits as varied as increased immunity by increasing the body's production of antibodies and subsequent lower blood pressure  and decreased risk of prostate cancer.
Sexually transmitted infections STIs are bacteriaviruses and parasiteswhich are passed from person to person during sexual contact, especially penetrative sexual intercourse.
Some, in particular HIV and syphilis, can also be passed in other ways, including from mother to child during pregnancy and childbirththrough blood productsand by shared hypodermic needles. Untreated chlamydia infection can lead to female infertility and ectopic pregnancy. Human papillomavirus can lead to genital and cervical cancers. Syphilis can result in stillbirths and neonatal deaths.
Untreated gonococcal infections
Sexual activities in human in miscarriagespreterm births and perinatal deaths. Infants born to mothers with untreated gonorrhea or chlamydia can develop neonatal conjunctivitis a serious eye infectionwhich can lead to blindness. There are 19 million new cases of sexually transmitted infections every year in the U.
The World Health Organization also stated that the "estimated 1. In cases where infection is suspected, early medical intervention is highly beneficial in all cases. They added that "several co-factors may increase the risk of HIV transmission through oral sex"; this includes ulcers, bleeding gumsgenital sores, and the presence of other STIs. Inthe World Health Organization estimated that million Sexual activities in human become pregnant Sexual activities in human each year, and around 87 million of those pregnancies or Approximately 46 million pregnancies per year reportedly end in induced abortion.
However, many more women become pregnant and miscarry without even realizing it, instead mistaking the miscarriage for an unusually heavy menstruation. This Sexual activities in human includes live births, abortions, and fetal losses.
It has been linked to atypical levels of dopamine, a neurotransmitter. This behavior is characterized by a fixation on sexual intercourse and disinhibition. It was proposed that this 'addictive behavior' be classified in as an impulsive—compulsive behavioral disorder.
Addiction to sexual intercourse is thought to be genetically linked. Those having an addiction to sexual intercourse have a higher response to visual sexual cues in the brain. Those seeking treatment will typically see a physician for pharmacological management and therapy. It is manifested by hypersomnia and hypersexuality and remains relatively rare.
Sexual activity can directly cause deathparticularly due to coronary circulation complications, which is sometimes called coital death, coital sudden death or coital coronary. Sexual intercourse, when involving a male participant, often when the male has ejaculated, and thus the partner might not have time to reach orgasm. Inscholars from the Kinsey Institute stated, "The truth is that the time between penetration and ejaculation varies not only from man to man, but from one time to the next for the same man.
But he didn't ask if the men or their partners considered two minutes mutually satisfying" and "more recent research reports slightly longer times for intercourse". Anorgasmia is regular difficulty reaching orgasm after ample sexual stimulation, causing personal distress. Vaginismus is involuntary tensing of the pelvic floor musculature, making coitus, or any form of penetration of the vagina, distressing, painful and sometimes impossible for women.
It is a conditioned reflex of the pubococcygeus muscle, and is sometimes referred to as the PC muscle. Vaginismus can be hard to overcome because if a woman expects to experience pain during sexual intercourse, this can cause a muscle spasm, which results in painful sexual intercourse.
For those whose impotence is caused by medical conditions, prescription drugs such as ViagraCialisand Levitra are available. However, doctors caution against the unnecessary use of these drugs because they are accompanied by serious risks such as increased chance of heart attack.
Sexual intercourse remains possible after major medical treatment of the reproductive organs and structures. This is especially true for women.
Even after extensive gynecological surgical procedures such as hysterectomyoophorectomysalpingectomy "Sexual activities in human," dilation and curettagehymenotomyBartholin gland surgery, abscess removal, vestibulectomylabia minora reduction, cervical conizationsurgical and radiological cancer treatments and chemotherapycoitus can continue.
Reconstructive surgery remains an option for women who have experienced benign and malignant conditions. Obstacles that those with Sexual activities in human face with regard to engaging in sexual intercourse include pain, depressionfatigue, negative body imagestiffness, functional impairment, anxiety, reduced libidohormonal imbalance, and drug treatment or side effects.
Sexual functioning has been regularly identified as a neglected area of the quality of life in patients with rheumatoid arthritis.
The mentally disabled also are subject to challenges in participating in sexual intercourse. Women with Intellectual disabilities ID are often presented with situations that prevent sexual intercourse. This can include the lack of a knowledgeable healthcare provider trained and experienced in counseling those with ID on sexual intercourse.
Those with ID may have hesitations regarding the discussion of the topic of sex, a lack of sexual knowledge and limited opportunities for sex education. Human sexual activity Latest Breaking News, Pictures, Videos, and Special Reports from The Economic Times.
Human sexual activity Blogs, Comments and. human behaviour which is sexually motivated, including sexual intercourse. Erotic scence sandisfield.info sandisfield.info Wikipedia.
Compr Ther. Spring;34(1)
Sexual activities in human sexual intercourse. Wehrmacher WH(1), Messmore HL. Author information: (1)Loyola University Medical Center.