MISSIONARY POSITION

The missionary position is a "man-on-top" sex position usually described as the act in which the woman lies on her back and the partners face each other. Though often acted on and applied by heterosexual pairings, it may also be used by gay and lesbian couples.

The missionary position is an example of ventro-ventral copulation. Variations of the position allow varying degrees of vaginal tightness, clitoral stimulation, depth of penetration, participation on the part of the woman, and likelihood and speed of orgasm.

A common myth states that the term "missionary position" arose in response to Christianmissionaries, who taught that the position was the only proper way to engage in sexual intercourse. This explanation probably originated from Alfred Kinsey's Sexual Behavior in the Human Male through a confluence of misunderstandings and misinterpretations of historical documents. Tuscans refer to the position as "The Angelic Position" while some Arabic-speaking groups call it "the manner of serpents.

The missionary position is often preferred by couples who enjoy its romantic qualitiesafforded by copious skin-to-skin contact and opportunities to look into each other's eyes and kiss and caress each other. The position is also believed to be a good position forprocreation. During sex, missionary allows the man to take charge of the rhythm and depth of thrusting. It is also possible for the woman to thrust against him by moving her hips or pushing her feet against the bed, or squeeze him closer with her arms or legs. The position is less suitable for late stages of pregnancy, or when it is desired for the woman to have greater control over rhythm and depth of penetration.

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69

Sixty-nine or 69, also known by its French name soixante-neuf (69), is a group of sex positions in which two people align themselves so that each person's mouth is near the other's genitals, simultaneously performing oral sex. The participants are thus mutually inverted like the numerals 6 and 9 in the number 69, hence the name. This position can involve any combination of sexes. Although not displayed in any of the images, a 69 can also be performed with both partners on their sides, perhaps a more relaxed position.

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ANAL SEX

Anal sex (also called anal intercourse) is the sex act in which the penis is inserted into the anus of a sexual partner. The term can also include other sexual acts involving the anus, including pegging, anilingus, fingering, and object insertion.

While anal sex is commonly associated with male homosexuality, research shows that not all gay males engage in anal sex and that it is not uncommon in heterosexual relationships. Types of anal sex can also be a part of lesbian sexual practices.

Many people find anal sex pleasurable, and some may reach orgasm—through stimulation of the prostate in men, and clitoral and G-Spot leg stimulation in women. However, many people find it painful as well, sometimes extremely so, which may be psychosomatic in some cases. As with most forms of sexual interaction, individuals are at risk for contracting sexually transmitted diseases, and therefore safe-sex practices are advised. Anal sex is considered a high-risk sexual practice, and unprotected anal sex is the riskiest of all forms of sexual intercourse, due to the vulnerability of the rectum and sphincter tissues. It generally requires a generous application of a personal lubricant to prevent tearing, since the anus does not have sufficient natural lubrication.

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ORAL SEX

Oral sex is sexual activity involving the stimulation of the genitalia of a sex partner by the use of the mouth, tongue, teeth or throat. Cunnilingus refers to oral sex performed on females while fellatio refer to oral sex performed on males. Anilingus refers to oral stimulation of a person's anus. Oral stimulation of other parts of the body (as in kissing and licking) is usually not considered oral sex. People may engage in oral sex as part of foreplay before sexual intercourse, during, or as intercourse. 

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GAY

Gay is a word (a noun or an adjective) that primarily refers to a homosexual person.

The term was originally used to refer to feelings of being "carefree", "happy", or "bright and showy"; it had also come to acquire some connotations of "immorality" as early as 1637. The term's use as a reference to homosexuality may date as early as the late 19th century, but its use gradually increased in the 20th century. In modern English, gay has come to be used as an adjective, and as a noun, referring to the people, especially to men, and the practices and cultures associated with homosexuality. By the end of the 20th century, the word gay was recommended by major LGBT groups and style guides to describe people attracted to members of the same sex. At about the same time, a new, pejorative use became prevalent in some parts of the world. In the Anglosphere, this connotation, among younger speakers, has a derisive meaning equivalent to rubbish or stupid (as in "That's so gay."). In this use, the word does not mean "homosexual", so it can be used, for example, to refer to an inanimate object or abstract concept of which one disapproves. This usage can also refer to weakness or unmanliness. When used in this way, the extent to which it still retains connotations of homosexuality has been debated and harshly criticized.

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SEMEN

Semen is an organic fluid, also known as seminal fluid, that may contain spermatozoa. It is secreted by the gonads (sexual glands) and other sexual organs of male or hermaphroditic animals and can fertilize female ova. In humans, seminal fluid contains several components besides spermatozoa: proteolytic and other enzymes as well as fructose are elements of seminal fluid which promote the survival of spermatozoa and provide a medium through which they can move or "swim".

Semen is produced and originates from the seminal vesicle, which is located in the pelvis. The process that results in the discharge of semen is called ejaculation.

 

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EJACULATION

Ejaculation is the ejection of semen (usually carrying sperm) from the male reproductory tract, and is usually accompanied by orgasm. It is usually the final stage and natural objective of male sexual stimulation, and an essential component of natural conception. In rare cases ejaculation occurs because of prostatic disease. Ejaculation may also occur spontaneously during sleep (a nocturnal emission or "wet dream"). Anejaculation is the condition of being unable to ejaculate. Dysejaculation is ejaculation that is painful or uncomfortable.

 

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ORGASM

Orgasm (from Greek οργασμός orgasmos, from organ to mature, swell, also sexual climax) is the sudden discharge of accumulated sexual tension during the sexual response cycle, resulting in rhythmic muscular contractions in the pelvic region characterized by an intense sensation of pleasure. Experienced by males and females, orgasms are controlled by the involuntary or autonomic nervous system. They are often associated with other involuntary actions, including muscular spasms in multiple areas of the body, a general euphoric sensation and, frequently, body movements and vocalizations are expressed. The period after orgasm (known as a refractory period) is often a relaxing experience, attributed to the release of the neurohormones oxytocin and prolactin.

Human orgasms usually result from the stimulation of the penis in males, typically accompanying ejaculation, and the clitoris in females. Stimulation can be by self-practice (masturbation) or by a partner (penetrative sexual intercourse, non-penetrative sex, and other erotic sexual activities). In addition, partners simultaneously stimulating each other's sex organs by mutual masturbation, penetrative intercourse, or other rhythmic inter-genital contact may experience simultaneous orgasms.

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MASTURBATION

Masturbation refers to the sexual stimulation of a person's genitals, usually to the point of orgasm. The stimulation can be performed manually, by use of objects or tools, or by some combination of these methods. Masturbation is a common form of autoeroticism, providing sexual pleasure or orgasm in the absence of a partner. The act, when performed with a partner, is called mutual masturbation and is sometimes used as an alternative to sexual intercourse.

Men and women have techniques and characteristics in common, but also have specific preferences in the ways they like to masturbate. Studies have found that masturbation is frequent in humans of both sexes and all ages, although there is variation. Various medical and psychological benefits have been attributed to a healthy attitude to sex in general and to masturbation in particular, and no causal relationship is known between masturbation and any form of mental or physical disorder. Acts of masturbation have been celebrated in art worldwide since prehistory. While there was a period (from the late 18th to the early 20th century) when it was subject to medical censure and social conservatism, it is considered a normal part of healthy life today. There have been masturbation marathons and health service slogans such as "an orgasm a day keeps the doctor away". It is commonly mentioned in popular music as well as on television, in films and in literature.

Animal masturbation has been observed in many species, both in the wild and in captivity.

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SEXUAL INTERCOURSE

Sexual intercourse, also known as copulation or coitus, commonly refers to the insertion of a male's penis into a female's vagina for the purposes of sexual pleasure or reproduction. The term may also describe other sexual penetrative acts, such as anal sex, oral sex and fingering, or use of a strap-on dildo, which can be practiced by heterosexual and homosexual pairings or more than two partners.

Sexual intercourse can play a strong role in human bonding, often being used solely for pleasure and leading to stronger emotional bonds. Non-penetrative sex (for example, non-penetrative cunnilingus) has been referred to as "outercourse", but may also be among the sexual acts contributing to human bonding and considered intercourse. The term sex can be taken to mean any mutual genital stimulation or to mean any form of sexual activity (i.e. all forms of intercourse and "outercourse"). Individuals can be at risk of contracting sexually transmitted diseases, and thus safe sex practices are advised.

In human societies, some jurisdictions have placed various restrictive laws against certain sexual activities such as gay sex, sex with minors, incest, extramarital sex, position-of-trust sex, prostitution, sodomy, public lewdness, polygamy and rape. Religious beliefs can play a role in decisions about sex, or its purpose, as well; for example, with virginity pledges. Some sections of Christianity commonly view sex between a married couple for the purpose of reproduction as holy, while other sections may not. Modern Judaism and Islam view sexual intercourse between husband and wife as a spiritual and edifying action. Hinduism and Buddhism views on sexuality have differing interpretations.

Sexual intercourse between non-human animals is more often referred to as copulation; for most, mating and copulation occurs at the point of estrus (the most fertile period of time in the female's reproductive cycle), which increases the chances of successful impregnation. However, bonobos, dolphins, and chimpanzees are known to engage in sexual intercourse even when the female is not in estrus, and to engage in sex acts with same-sex partners. Like humans engaging in sex primarily for pleasure, this behavior in the above mentioned animals is also presumed to be for pleasure, and a contributing factor to strengthening their social bonds.

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PENIS

The human penis is an external sexual organ of male humans. It is a reproductive, intromittent organ that additionally serves as the urinal duct.

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MALE REPRODUCTIVE SYSTEM

The human male reproductive system (or male genital system) consists of a number of sex organs that are a part of the human reproductive process. In this type of reproductive system, these sex organs are located outside the body, around the pelvic region.
The main anatomically male sex organs are the penis and the testes which produce semen and sperm, which as part of sexual intercourse fertilize an ovum in an anatomically female person's body and the fertilized ovum (zygote) gradually develops into a fetus, which is later born as a child.

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REPRODUCTIVE SYSTEM

Human reproduction takes place as internal fertilization by sexual intercourse. During this process, the erect penis of the male is inserted into the female's vagina until the male ejaculates semen, which contains sperm, into the female's vagina. The sperm then travels through the vagina and cervix into the uterus or fallopian tubes for fertilization of the ovum. Upon successful fertilization and implantation, gestation of the foetus then occurs within the female's uterus for approximately nine months, this process is known as pregnancy in humans. Gestation ends with birth, the process of birth is known as labor. Labor consists of the muscles of the uterus contracting, the cervix dilating, and the baby passing out the vagina. Human's babies and children are nearly helpless and require high levels of parental care for many years. One important type of parental care is the use of the mammary glands in the female breasts to nurse the baby.

Humans have a high level of sexual differentiation. In addition to differences in nearly every reproductive organ, numerous differences typically occur in secondary sexual characteristics.

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MAN

In English, lower case man (pl. men) refers to an adult human male (the term boy is the usual term for a human male child or adolescent). Sometimes it is also used as an adjective to identify a set of male humans, regardless of age, as in phrases such as "men's rights". Although men typically have a male reproductive system, some intersex people with ambiguous genitals, and biologically female transgender people, may also be classified or self-identify as a "man".

The term manhood is used to refer to masculinity, the various qualities and characteristics attributed to men such as strength and male sexuality.

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HUMAN ANATOMY

Human anatomy is primarily the scientific study of the morphology of the human body. Anatomy is subdivided into gross anatomy and microscopic anatomy. Gross anatomy (also called topographical anatomy, regional anatomy, or anthropotomy) is the study of anatomical structures that can be seen by the naked eye. Microscopic anatomy is the study of minute anatomical structures assisted with microscopes, which includes histology (the study of the organization of tissues), and cytology (the study of cells). Anatomy, human physiology (the study of function), and biochemistry (the study of the chemistry of living structures) are complementary basic medical sciences that are generally together (or in tandem) to students studying medical sciences.

In some of its facets human anatomy is closely related to embryology, comparative anatomy and comparative embryology, through common roots in evolution; for example, much of the human body maintains the ancient segmental pattern that is present in all vertebrates with basic units being repeated, which is particularly obvious in the vertebral column and in the ribcage, and can be traced from very early embryos.

The human body consists of biological systems, that consist of organs, that consist of tissues, that consist of cells and connective tissue.

The history of anatomy has been characterized, over a long period of time, by a continually developing understanding of the functions of organs and structures in the body. Methods have also advanced dramatically, advancing from examination of animals through dissection of fresh and preserved cadavers (dead human bodies) to technologically complex techniques developed in the 20th century.

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HUMAN

Humans are the only living species in the Homo genus. Anatomically modern humans originated in Africa about 200,000 years ago, reaching full behavioral modernity around 50,000 years ago.

Humans have a highly developed brain and are capable of abstract reasoning, language, introspection, and problem solving. This mental capability, combined with an erect body carriage that frees the hands for manipulating objects, has allowed humans to make far greater use of tools than any other living species on Earth. Other higher-level thought processes of humans, such as self-awareness, rationality, and sapience, are considered to be defining features of what constitutes a "person".

Humans are uniquely adept at utilizing systems of communication for self-expression, the exchange of ideas, and organization. Humans create complex social structures composed of many cooperating and competing groups, from families and kinship networks, to nations. Social interactions between humans have established an extremely wide variety of values, social norms, and rituals, which together form the basis of human society. With individuals widespread in every continent except Antarctica, humans are a cosmopolitan species. As of November 2011, the human population was estimated by the United Nations Population Division to be about 7 billion, and by the United States Census Bureau to be about 6.97 billion.

Humans are noted for their desire to understand and influence their environment, seeking to explain and manipulate phenomena through science, philosophy, mythology, and religion. This natural curiosity has led to the development of advanced tools and skills, which are passed down culturally; humans are the only species known to build fires, cook their food, clothe themselves, and create and use numerous other technologies and arts. The study of humans is the scientific discipline of anthropology.

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