Oral sex

oraloral copulationfellatiooral stimulationoral-genital sexblowblow jobblowjobCunnilingusdown on them
Oral sex, sometimes referred to as oral intercourse, is sexual activity involving the stimulation of the genitalia of a person by another person using the mouth (including the lips, tongue, or teeth) and the throat.wikipedia
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Cunnilingus

oral sexgoes downCunnilinctus
Cunnilingus is oral sex performed on the vulva or vagina, while fellatio is oral sex performed on the penis. However, a barrier protection like a condom for fellatio or dental dam for cunnilingus can offer some protection from contact when practicing oral sex.
Cunnilingus is an oral sex act performed by a person on the vulva or vagina of another person.

Human sexual activity

sexual activitysexual behaviorsex
Oral sex, sometimes referred to as oral intercourse, is sexual activity involving the stimulation of the genitalia of a person by another person using the mouth (including the lips, tongue, or teeth) and the throat.
People engage in a variety of sexual acts, ranging from activities done alone (e.g., masturbation) to acts with another person (e.g., sexual intercourse, non-penetrative sex, oral sex, etc.) in varying patterns of frequency, for a wide variety of reasons.

Anilingus

analingusrimminganal–oral sex
Anilingus, another form of oral sex, is oral stimulation of the anus.
Anilingus (from the Latin anus + -lingus, from lingere, "to lick", variantly spelled "analingus", ) 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.

Sexual intercourse

sexcopulationintercourse
Oral sex may be performed as foreplay to incite sexual arousal before other sexual activities (such as vaginal or anal intercourse), or as an erotic and physically intimate act in its own right. Oral sex is commonly used as a means of preserving virginity, especially among heterosexual pairings; this is sometimes termed technical virginity (which additionally includes anal sex, mutual masturbation and other non-penetrative sex acts, but excludes penile-vaginal sex).

Anal sex

analanal intercourseanal penetration
Oral sex may be performed as foreplay to incite sexual arousal before other sexual activities (such as vaginal or anal intercourse), or as an erotic and physically intimate act in its own right. Oral sex is commonly used as a means of preserving virginity, especially among heterosexual pairings; this is sometimes termed technical virginity (which additionally includes anal sex, mutual masturbation and other non-penetrative sex acts, but excludes penile-vaginal sex).
Other forms of anal sex include fingering, the use of sex toys for anal penetration, oral sex performed on the anus (anilingus), and pegging.

Sexually transmitted infection

venereal diseasesexually transmitted diseasesexually transmitted diseases
Like most forms of sexual activity, oral sex can pose a risk for contracting sexually transmitted infections (STIs/STDs). Oral sex is not necessarily an effective method of preventing sexually transmitted infections (STIs), although some forms of STIs are believed to be less commonly spread in this way, and oral sex has been recommended as a form of safe sex.
Sexually transmitted infections (STIs), also referred to as sexually transmitted diseases (STDs), are infections that are commonly spread by sexual activity, especially vaginal intercourse, anal sex and oral sex.

Facesitting

queening stoolSmotherboxsitting on their face
Facesitting is a form of oral sex in which the receiver sits on the giver's face and pushes into it with his or her genitals.
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.

Autofellatio

auto-fellatioauto-fellatesuck[ing] his own dick
Autofellatio is a possible but rare variant; autocunnilingus may also be possible for women with extremely flexible spines.
Autofellatio is the act of oral stimulation of one's own penis as a form of masturbation.

Foreplay

2004Playheatedhuman foreplay
Oral sex may be performed as foreplay to incite sexual arousal before other sexual activities (such as vaginal or anal intercourse), or as an erotic and physically intimate act in its own right.
Some common sexual behaviors that are considered foreplay are kissing, sexual touching, removing clothing, oral sex, certain sexual games, and role playing or dressing up.

69 (sex position)

6969 position69 sex position
Oral sex can also be performed by both partners at the same time in the so-called "sixty-nine" position.
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, each simultaneously performing oral sex on the other.

Vagina

birth canalvaginalvaginal opening
Cunnilingus is oral sex performed on the vulva or vagina, while fellatio is oral sex performed on the penis. However, there is a potential risk of pregnancy if semen comes in contact with the vaginal area in some way, such as semen in the ejaculate finding its way onto fingers, hands, or other body parts, which then comes in contact with the vaginal area.
In addition to penile penetration, pleasure can come from masturbation, fingering, oral sex (cunnilingus), or specific sex positions (such as the missionary position or the spoons sex position).

Virginity

virginmaidenvirgins
Commonly, people do not regard oral sex as affecting the virginity of either partner, though opinions on the matter vary. Oral sex is commonly used as a means of preserving virginity, especially among heterosexual pairings; this is sometimes termed technical virginity (which additionally includes anal sex, mutual masturbation and other non-penetrative sex acts, but excludes penile-vaginal sex).
Heterosexual individuals may or may not consider loss of virginity to occur only through penile-vaginal penetration, while people of other sexual orientations often include oral sex, anal sex or mutual masturbation in their definitions of losing one's virginity.

Non-penetrative sex

mutual masturbationdry humpingdry hump
Oral sex is commonly used as a means of preserving virginity, especially among heterosexual pairings; this is sometimes termed technical virginity (which additionally includes anal sex, mutual masturbation and other non-penetrative sex acts, but excludes penile-vaginal sex).
It generally excludes the penetrative aspects of vaginal, anal, or oral sexual activity, but includes various forms of sexual and non-sexual activity, such as frottage, mutual masturbation, kissing, or cuddling.

Sexual inhibition

inhibitioninhibitionssexually inhibited
People may also have negative feelings or sexual inhibitions about giving or receiving oral sex, or may flatly refuse to engage in the practice.
For example, cultural attitudes toward oral sex range from aversion to high regard.

Gang bang

gangbanggang-banggangbanged
An act of group sex restricted to one woman giving oral sex to several men is referred to as a gangsuck, blowbang or lineup, all derivatives of the slang term gang bang for group sex.
Rather than serial couplings by two people, the gang bang is defined by the number and simultaneity of the various sex acts, such as vaginal, anal or oral sex, or double or triple penetration.

Group sex

sex partyorgysex parties
An act of group sex restricted to one woman giving oral sex to several men is referred to as a gangsuck, blowbang or lineup, all derivatives of the slang term gang bang for group sex.
A daisy chain refers to sexual relations among three or more people, with each person both performing and receiving oral sex simultaneously.

Safe sex

safer sexunprotected sexunsafe sex
Oral sex is not necessarily an effective method of preventing sexually transmitted infections (STIs), although some forms of STIs are believed to be less commonly spread in this way, and oral sex has been recommended as a form of safe sex.
According to these guidelines, safe sex was practiced by using condoms also when engaging in anal or oral sex.

HIV/AIDS

AIDSHIVacquired immune deficiency syndrome
Any sexual exchange of bodily fluids with a person infected with HIV, the virus that causes AIDS, poses a risk of infection.
HIV is spread primarily by unprotected sex (including anal and oral sex), contaminated blood transfusions, hypodermic needles, and from mother to child during pregnancy, delivery, or breastfeeding.

Ejaculation

ejaculateejaculatedejaculates
However, there is a potential risk of pregnancy if semen comes in contact with the vaginal area in some way, such as semen in the ejaculate finding its way onto fingers, hands, or other body parts, which then comes in contact with the vaginal area.
Penile sexual stimulation during masturbation or vaginal, anal, oral, or non-penetrative sexual activity may provide the necessary stimulus for a man to achieve orgasm and ejaculation.

Birth control

contraceptioncontraceptivecontraceptives
Oral sex alone cannot result in pregnancy and heterosexual couples may perform oral sex as their method of contraception.
Deliberate non-penetrative sex without vaginal sex or deliberate oral sex without vaginal sex are also sometimes considered birth control.

Chlamydia

chlamydia infectionchlamydialChlamydial infection
Chlamydia, human papillomavirus (HPV), syphilis, gonorrhea, herpes, hepatitis (multiple strains), and other sexually transmitted infections (STIs), can be transmitted through oral sex.
Chlamydia can be spread during vaginal, anal, or oral sex, and can be passed from an infected mother to her baby during childbirth.

Lesbian

lesbianismlesbiansSapphic
By contrast, lesbian pairings commonly view oral sex or fingering as resulting in virginity loss, though definitions of virginity loss vary among lesbians as well.
Orogenital contact may indicate a higher risk of acquiring HSV, even among women who have had no prior sex with men.

Dental dam

rubber damdental damsrubber dams
However, a barrier protection like a condom for fellatio or dental dam for cunnilingus can offer some protection from contact when practicing oral sex.
Dental dams are also used for safer oral sex.

Herpes simplex virus

HSV-1HSVherpes virus
Chlamydia, human papillomavirus (HPV), syphilis, gonorrhea, herpes, hepatitis (multiple strains), and other sexually transmitted infections (STIs), can be transmitted through oral sex.
It may also be sexually transmitted, including contact with saliva, such as kissing and mouth-to-genital contact (oral sex).

Syphilis

syphilitictertiary syphilissecondary syphilis
Chlamydia, human papillomavirus (HPV), syphilis, gonorrhea, herpes, hepatitis (multiple strains), and other sexually transmitted infections (STIs), can be transmitted through oral sex.
It is thus transmissible by kissing near a lesion, as well as oral, vaginal, and anal sex.