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Sexual intercourse

Sexual intercourse is principally the insertion and thrusting of the penis, usually when erect, into the vagina for sexual pleasure, reproduction, or both. This is also known as vaginal intercourse or vaginal sex. Other forms of penetrative sexual intercourse include anal sex, oral sex, fingering, and penetration by use of a dildo. These activities involve physical intimacy between two or more individuals and are usually used among humans solely for physical or emotional pleasure and can contribute to human bonding.

Anal sex

Anal sex or anal intercourse is generally the insertion and thrusting of the erect penis into a person's anus, or anus and rectum, for sexual pleasure. Other forms of anal sex include fingering, the use of sex toys for anal penetration, oral sex performed on the anus (anilingus), and pegging. Although anal sex most commonly means penile–anal penetration, sources sometimes use anal intercourse to exclusively denote penile–anal penetration, and anal sex to denote any form of anal sexual activity, especially between pairings as opposed to anal masturbation.

Adultery

Adultery is extramarital sex that is considered objectionable on social, religious, moral, or legal grounds. Though what sexual activities constitute adultery varies, as well as the social, religious, and legal consequences, the concept exists in many cultures and is similar in Christianity, Islam, and Judaism. A single act of sexual intercourse is generally sufficient to constitute adultery, and a more long-term sexual relationship is sometimes referred to as an affair.

Erection

An erection is a physiological phenomenon in which the penis becomes firm, engorged, and enlarged. Penile erection is the result of a complex interaction of psychological, neural, vascular, and endocrine factors, and is often associated with sexual arousal or sexual attraction, although erections can also be spontaneous. The shape, angle, and direction of an erection varies considerably in humans.

Prostitution

Prostitution is the business or practice of engaging in sexual activity in exchange for payment. Prostitution is sometimes described as sexual services, commercial sex or, colloquially, hooking. Prostitution occurs in a variety of forms. Brothels are establishments specifically dedicated to prostitution. In escort prostitution, the act may take place at the client's residence or hotel room, or at the escort's residence or a hotel room rented for the occasion by the escort (in-call). Another form is street prostitution. Although the majority of prostitutes are female and have male clients, a prostitute can be, and have clients, of any gender or sexual orientation.

Anilingus

Anilingus is the oral and anal sex act in which a person stimulates the anus of another by using the mouth, including lips, tongue, or teeth. It is also called anal–oral contact and anal–oral sex; colloquial names include rimming and rim job. It may be performed by and on persons of any sexual orientation for pleasure or as a form of erotic humiliation. Health risks include fecal–oral transmission.

Pegging (sexual practice)

Pegging is a sexual practice in which a woman performs anal sex on a man by penetrating his anus with a strap-on dildo. This practice may also involve stimulating the male genitalia.

Threesome

In human sexuality, a threesome is sexual activity that involves three people at the same time. Threesome can also refer to a love triangle, a three-way romantic relationship. Though threesome is most commonly applied to a casual sexual activity involving sexual activity among three participants, a threesome may also be found in a long-term domestic relationship, such as polyamory or a ménage à trois.

Group sex

Group sex is sexual behavior involving more than two participants. Group sex can occur between people of all sexual orientations and genders. Group sex also occurs in populations of non-human animals such as bonobo apes and chimpanzees.

Prostitution in Thailand

Prostitution in Thailand has been common in modern Thailand and its predecessor states for centuries. During the Ayutthaya Kingdom (1351–1767), prostitution was legal and taxed, and the state ran brothels. Since 1960, prostitution in Thailand has been de jure illegal. Nevertheless, it was estimated to be worth US$6.4 billion a year in revenue (2015), accounting for a significant portion of the national GDP.

Orgy

In modern usage, an orgy is a sex party where guests freely engage in open and unrestrained sexual activity or group sex.

Prostitution in India

Prostitution is legal in India. A number of related activities including soliciting in a public place, kerb crawling, owning or managing a brothel, prostitution in a hotel, child prostitution, pimping and pandering are illegal. There are however many brothels illegally operating in Indian cities including Mumbai, Delhi and Kolkata. UNAIDS estimate there to be 657,829 prostitutes in the country.

Fornication

Fornication is generally consensual sexual intercourse between two people not married to each other. When one of the partners to consensual sexual intercourse is a married person, it may be described as adultery.

Facesitting

Facesitting, also known as queening or kinging, is a sexual practice in which one partner sits on or over the other's face, typically to allow or force oral–genital or oral–anal contact. In addition to oral-genital and oral-anal contact, the position also leaves the bottom partner's hands free to stimulate other erogenous zones. The top partner may be facing either direction in this position. It is common for this position to form part of BDSM, involving dominance and submission, though this need not be the case. Within a BDSM or D/s context, facesitting can be a form of erotic humiliation.

Bareback (sex)

Bareback sex is physical sexual activity, especially sexual penetration, without the use of a condom. It most commonly refers to anal sex between men who have sex with men without the use of a condom, and may be distinguished from unprotected sex because of the deliberate act of forgoing condom use that is associated with it.