Fellatio#Deep-throating

The English noun fellatio comes from the Latin {{lang|la|fellātus}}, the past participle of the verb {{lang|la|fellāre}}, meaning "to suck".{{cite book|title = The Chambers Dictionary | publisher = Allied Chambers (India) limited |year = 2002|page=592|access-date = September 16, 2023 |isbn= 978-8-18606-225-8 |url =https://books.google.com/books?id=pz2ORay2HWoC&dq=%E2%80%9Cfellatio%E2%80%9D+%E2%80%9Cfell%C4%81tus%E2%80%9D&pg=PA592}} In fellatio, the -us is replaced by the -io while the declension stem ends in -ion-, which gives the suffix the form -ion (cf. French fellation). The -io(n) ending is used in English to create nouns from Latin adjectives and it can indicate a state or action wherein the Latin verb is being, or has been, performed.

Further English words have been created based on the same Latin root. A person who performs fellatio upon another (i.e. who fellates) may be termed a fellator. Latin's gender based declension means this word may be restricted to describing a male. The equivalent term for a female is fellatrix.

File:Édouard-Henri Avril (20).jpg (1849–1928) depicting fellatio]]

The essential aspect of fellatio is oral stimulation of the penis (including the shaft and glans) through sucking with the mouth, use of the tongue for licking, using the lips, or some combination. One method is the sex partner taking the penis into the mouth and moving smoothly up and down to a rhythm while being careful to avoid contact with the teeth. Fellatio also includes oral stimulation of the scrotum, whether licking, sucking or taking the entire scrotum into the mouth. During the act, orgasm may be achieved and semen may be ejaculated into the partner's mouth. When the penis is thrust into someone's mouth, it is called irrumatio, though the term is rarely used.{{cite web|url=http://www.sex-lexis.com/Sex-Dictionary/irrumatio|title=irrumatio in Sex-Lexis|access-date=2009-07-07|archive-date=2018-09-30|archive-url=https://web.archive.org/web/20180930020011/http://www.sex-lexis.com/Sex-Dictionary/irrumatio|url-status=live}}

Performing fellatio can trigger the gag reflex.{{cite book|last1=Bullough |first1=Bonnie |last2= Bullough|first2= Vern|title = Human Sexuality: An Encyclopedia | publisher = Garland Pub.|year = 1994|access-date = September 14, 2023 |page=427|isbn= 978-0-82407-972-7 |url = https://books.google.com/books?id=y5HFtMkmFMYC&dq=%E2%80%9Cfellatio%E2%80%9D+%E2%80%9Cgag+reflex%E2%80%9D&pg=PA427}}

It is physically possible for men with sufficient flexibility, penis size, or both, to perform fellatio on themselves as a form of masturbation, in an act called autofellatio. However, few men possess the flexibility and penis length to safely perform the necessary frontbend.{{cite book | title=Savage Love: Straight Answers from America's Most Popular Sex Columnist | publisher=Penguin Books | author=Savage, Dan | year=1998 | pages=242 | isbn=978-0452278158|author-link=Dan Savage}}

{{Further|Semen#Ingestion}}

During fellatio, a partner may ingest semen from the penis. As late as 1976, some doctors were advising women in the eighth and ninth months of pregnancy not to swallow semen lest it induce premature labor, but it was later determined to be safe.{{cite book|title=The Pregnant Couple's Guide to Sex, Romance, and Intimacy|author1=Sandra Margot |author2=Tonianne Robino |isbn=978-0-8065-2323-1|pages=122–123|year=2002 |publisher=Citadel Press }}

The receiver of fellatio typically becomes sexually aroused. Once the prerequisite level of sexual stimulation has been achieved and ejaculation becomes imminent, the semen may be discharged onto his partner. The male may position his penis prior to ejaculation so that semen will be deposited onto his partner's face (known as a "facial"), or other body part such as their neck, chest or breast.{{Cite book|last1=Staff|first1=Dalzell Victor Eds|url=https://books.google.com/books?id=mAdUqLrKw4YC&pg=PA1455|title=The New Partridge Dictionary of Slang and Unconventional English: J-Z|last2=Partridge|first2=Eric|date=2006|publisher=Taylor & Francis|isbn=978-0-415-25938-5|language=en|access-date=2021-06-02|archive-date=2021-06-03|archive-url=https://web.archive.org/web/20210603002407/https://books.google.com/books?id=mAdUqLrKw4YC&pg=PA1455|url-status=live}}

File:Wiki-dthroat (cropped).png

Deep-throating is a sexual act in which a person takes a partner's entire erect penis into the mouth and throat.{{cite book|url=https://archive.org/details/leonardodavincip00freu_0|title=Leonardo da Vinci: A Psychosexual Study of an Infantile Reminiscence|author=Freud, Sigmund|publisher=Moffat Yard & Company|year=1916|location=New York|pages=[https://archive.org/details/leonardodavincip00freu_0/page/39 39]|quote=The situation contained in the phantasy, that a vulture opened the mouth of the child and forcefully belabored it with its tail, corresponds to the idea of fellatio, a sexual act in which the member is placed into the mouth of the woman.|access-date=January 7, 2012}} The technique and term became popularized by the 1972 pornographic film Deep Throat.{{Citation needed|date=February 2025}} For deep-throating, the penis must be long enough so that it can reach the back of the receiver's throat.{{cite book |author=Wright, Anne |url=https://books.google.com/books?id=ZxVCHdCqOKYC&pg=PA161 |title=Grandma's Sex Handbook |publisher=Intimate Press, USA |year=2009 |isbn=978-0-578-02075-4 |page=161 |access-date=January 7, 2012 |archive-url=https://web.archive.org/web/20200731130558/https://books.google.com/books?id=ZxVCHdCqOKYC&pg=PA161 |archive-date=July 31, 2020 |url-status=live}}

Deep-throating can be difficult because of the natural gag reflex that is triggered when the soft palate is touched.{{cite web|url=http://www.neuroanatomy.wisc.edu/virtualbrain/BrainStem/09NA.html|title=Medical Neurosciences|last1=McDougal|first1=David|last2=Van Lieshout|first2=Dave|publisher=UW-Madison Medical school.|archive-url=https://web.archive.org/web/20120306024508/http://www.neuroanatomy.wisc.edu/virtualbrain/BrainStem/09NA.html|archive-date=March 6, 2012|access-date=January 7, 2012|last3=Harting|first3=John}}{{cite web|url=http://wordnet.princeton.edu/|title=About WordNet - WordNet - About WordNet|date=2010|publisher=Princeton University.|access-date=January 7, 2012|archive-date=February 8, 2010|archive-url=https://web.archive.org/web/20100208082435/http://wordnet.princeton.edu/wordnet/related-projects/|url-status=live}} People have different sensitivities to this reflex. With practice, some learn to suppress it. Deep-throating leads to a different kind of sexual stimulation of the penis than regular fellatio: the tongue's movement is restricted during deep-throating and sucking becomes impossible;{{cite book|url=https://books.google.com/books?id=q8qtd61hoB8C&pg=PA260|title=The Bedside Orgasm Book: 365 Days of Sexual Ecstasy|author=Gentry, Cynthia W.|publisher=Fair Winds Press|year=2005|isbn=1-59233-101-7|location=Gloucester, Massachusetts USA|page=260|access-date=January 7, 2012|archive-date=July 31, 2020|archive-url=https://web.archive.org/web/20200731141337/https://books.google.com/books?id=q8qtd61hoB8C&pg=PA260|url-status=live}} the tightness of the pharynx can intensely stimulate the glans of the penis.

File:Wiki-sixtynine-male.jpg]]

The male receiving fellatio receives direct sexual stimulation, while his partner may derive satisfaction from giving him pleasure. Giving and receiving fellatio may happen simultaneously in sex positions like 69 and daisy chain.

Fellatio is sometimes practiced when vaginal or anal penetration would create a physical difficulty for a sex partner. For example, it may be practiced during pregnancy instead of vaginal intercourse by couples wishing to engage in intimate sexual activity while avoiding the difficulty of vaginal intercourse during later stages of pregnancy.{{cite web |url=http://www.babycenter.com/400_is-it-safe-to-swallow-semen-during-pregnancy_510175_1000.bc |title=Is it safe to swallow semen during pregnancy? |publisher=BabyCenter |access-date=2010-03-19 |archive-date=2008-02-15 |archive-url=https://web.archive.org/web/20080215195603/http://www.babycenter.com/400_is-it-safe-to-swallow-semen-during-pregnancy_510175_1000.bc |url-status=usurped }}

Other reasons why a woman may not wish to have vaginal intercourse include apprehension of losing her virginity or of becoming pregnant, or because she may be menstruating.

Chlamydia, human papillomavirus (HPV), gonorrhea, herpes, hepatitis (multiple strains), and other sexually transmitted infections (STIs) can be transmitted through oral sex.{{cite web| title = Sexually Transmitted Disease Surveillance| publisher = Centers for Disease Control and Prevention (CDC)| year = 2008| access-date = December 6, 2011| url = https://www.cdc.gov/std/stats08/surv2008-Complete.pdf| archive-date = October 2, 2018| archive-url = https://web.archive.org/web/20181002174224/https://www.cdc.gov/std/stats08/surv2008-Complete.pdf| url-status = live}} Also see [https://www.cdc.gov/std/stats08/2008survFactSheet.PDF Fact Sheet] {{Webarchive|url=https://web.archive.org/web/20181002174828/https://www.cdc.gov/std/stats08/2008survFactSheet.PDF |date=2018-10-02 }} Any sexual exchange of bodily fluids with a person infected with HIV, the virus that causes AIDS, poses a risk of infection. Risk of STI infection, however, is generally considered significantly lower for oral sex than for vaginal or anal sex, with HIV transmission considered the lowest risk with regard to oral sex.{{cite book|author=Robert J. Pratt|title=HIV & AIDS: A Foundation for Nursing and Healthcare Practice|publisher=CRC Press|page=306|isbn=978-0-340-70639-8|year=2003|access-date=August 21, 2013|url=https://books.google.com/books?id=naSG-2RgRiYC&pg=PA306|archive-date=July 31, 2020|archive-url=https://web.archive.org/web/20200731133048/https://books.google.com/books?id=naSG-2RgRiYC&pg=PA306|url-status=live}}{{cite book|author=Marshall Cavendish Corporation|title=Sex and Society, Volume 1|isbn=978-0-7614-7906-2|publisher=Marshall Cavendish Corporation|page=61|year=2010|access-date=August 29, 2013|url=https://books.google.com/books?id=aVDZchwkIMEC&pg=PA61|archive-date=July 31, 2020|archive-url=https://web.archive.org/web/20200731132841/https://books.google.com/books?id=aVDZchwkIMEC&pg=PA61|url-status=live}}

There is an increased risk of STI transmission if the receiving partner has wounds on their genitals, or if the giving partner has wounds or open sores on or in their mouth, or bleeding gums.{{Cite web|title=Oral Sex and HIV Risk |date=June 2009 |access-date=August 30, 2013 |publisher=Centers for Disease Control and Prevention (CDC) |url=https://www.cdc.gov/hiv/resources/Factsheets/pdf/oralsex.pdf |archive-url=https://web.archive.org/web/20130510210937/http://www.cdc.gov/hiv/resources/Factsheets/pdf/oralsex.pdf |archive-date=May 10, 2013 }} Brushing the teeth, flossing, or undergoing dental work soon before or after giving fellatio can also increase the risk of transmission, because all of these activities can cause small scratches in the lining of the mouth. These wounds, even when they are microscopic, increase the chances of contracting STIs that can be transmitted orally under these conditions. Such contact can also lead to more mundane infections from common bacteria and viruses found in, around and secreted from the genital regions. Because of the aforementioned factors, medical sources advise the use of condoms or other effective barrier methods when performing or receiving fellatio with a partner whose STI status is unknown.

Links have been reported between oral sex and oral cancer with HPV-infected people.{{cite web|url=http://www.oralcancerfoundation.org/hpv/index.htm |title=The HPV Connection |archive-url=https://web.archive.org/web/20140227175640/http://www.oralcancerfoundation.org/hpv/index.htm |archive-date=2014-02-27 }}

A 2007 study suggested a correlation between oral sex and throat cancer. It is believed that this is due to the transmission of HPV, a virus that has been implicated in the majority of cervical cancers and which has been detected in throat cancer tissue in numerous studies. The study concludes that people who had one to five oral sex partners in their lifetime had approximately a doubled risk of throat cancer compared with those who never engaged in this activity and those with more than five oral sex partners had a 250 percent increased risk.{{cite journal |author=D'Souza G |title=Case-control study of human papillomavirus and oropharyngeal cancer |journal=N. Engl. J. Med. |volume=356 |issue=19 |pages=1944–1956 |year=2007 |pmid=17494927 |doi=10.1056/NEJMoa065497 |author2=Kreimer AR |author3=Viscidi R |display-authors=3 |last4=Pawlita |first4=Michael |last5=Fakhry |first5=Carole |last6=Koch |first6=Wayne M. |last7=Westra |first7=William H. |last8=Gillison |first8=Maura L.|s2cid=18819678 |doi-access=free }}Khamsi, Roxanne, [https://www.newscientist.com/article.ns?id=dn11819 "Oral sex can cause throat cancer"] {{Webarchive|url=https://web.archive.org/web/20070930045811/http://www.newscientist.com/article.ns?id=dn11819 |date=2007-09-30 }}, New Scientist, London, 9 May 2007.{{cite web |url=https://www.newscientist.com/article.ns?id=dn11819 |title=New Scientist: "Oral sex can cause throat cancer" – 09 May 2007 |publisher=newscientist.com |access-date=2010-03-19 |archive-date=2007-09-30 |archive-url=https://web.archive.org/web/20070930045811/http://www.newscientist.com/article.ns?id=dn11819 }}

{{See also|Paternal tolerance}}

Fellatio cannot result in pregnancy, as there is no way for ingested sperm to reach the uterus and fallopian tubes to fertilize an egg cell. At any rate, acids in the stomach and digestive enzymes in the gastrointestinal tract break down and kill spermatozoa.

Clinical research has tentatively linked fellatio with immune modulation,{{Cite journal |last1=Robertson |first1=Sarah A |last2=Ingman |first2=Wendy V |last3=O'Leary |first3=Sean |last4=Sharkey |first4=David J |last5=Tremellen |first5=Kelton P |date=1 October 2002 |title=Transforming growth factor β—a mediator of immune deviation in seminal plasma |url=https://www.sciencedirect.com/science/article/pii/S0165037802000153 |journal=Journal of Reproductive Immunology |volume=57 |issue=1 |pages=109–128 |doi=10.1016/S0165-0378(02)00015-3 |pmid=12385837 |issn=0165-0378}} indicating it may reduce the chance of complications during pregnancy. The potentially fatal complication pre-eclampsia was observed to occur less in women who regularly engaged in fellatio, with those who also ingested their partner's semen being at the least risk.{{cite journal |last1=Koelman |year=2000 |title=Correlation between oral sex and a low incidence of preeclampsia: A role for soluble HLA in seminal fluid? |journal=Journal of Reproductive Immunology |volume=46 |pages=155–166 |doi=10.1016/S0165-0378(99)00062-5 |pmid=10706945 |first1=CA |issue=2 |url=https://research.rug.nl/en/publications/79065d3c-9efc-4a5d-a084-8fca0c46c6aa |display-authors=etal}} The results were consistent with the fact that semen contains TGF-β1, the exchange of which between partners has a causal reduction in risk of pre-eclampsia caused by an immunological reaction. However, fellatio is not the only viable mechanism for the transmission of TGF-β1.{{Cite journal |last=Taylor |first=Robert N. |date=January 1997 |title=Review: Immunobiology of Preeclampsia |url=https://onlinelibrary.wiley.com/doi/10.1111/j.1600-0897.1997.tb00195.x |journal=American Journal of Reproductive Immunology |language=en |volume=37 |issue=1 |pages=79–86 |doi=10.1111/j.1600-0897.1997.tb00195.x |pmid=9138457 |s2cid=42576690 |issn=1046-7408}}{{Cite journal |last1=Chaouat |first1=Gérard |last2=Robillard |first2=Pierre-Yves |last3=Dekker |first3=Gustaaf |date=1 October 2005 |title=Fourth International Workshop on Immunology of Pre-eclampsia, December 2004, Reunion, France |url=https://www.sciencedirect.com/science/article/pii/S0165037805001385 |journal=Journal of Reproductive Immunology |series=Proceedings of Post-Congress Kyoto Symposium |volume=67 |issue=1 |pages=103–111 |doi=10.1016/j.jri.2005.09.004 |pmid=16315347 |issn=0165-0378}}

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, manual sex and other non-penetrative sex acts, but excludes penile-vaginal sex).{{cite book | author = Ken Plummer | title = Modern Homosexualities: Fragments of Lesbian and Gay Experiences | publisher = Routledge | year = 2002 | pages = 187–191 | access-date = August 24, 2013 | isbn = 978-1-134-92242-0 | url = https://books.google.com/books?id=OSO3q4XEfz4C&pg=PA189 | quote = The social construction of 'sex' as vaginal intercourse affects how other forms of sexual activity are evaluated as sexually satisfying or arousing; in some cases whether an activity is seen as a sexual act at all. For example, unless a woman has been penetrated by a man's penis she is still technically a virgin even if she has had lots of sexual experience. | archive-date = March 18, 2015 | archive-url = https://web.archive.org/web/20150318215831/http://books.google.com/books?id=OSO3q4XEfz4C&pg=PA189 | url-status = live }} The concept of "technical virginity" or sexual abstinence through oral sex is particularly popular among teenagers in the United States,{{cite news|first=Sharon|last=Jayson|title='Technical virginity' becomes part of teens' equation|newspaper=USA Today|date=2005-10-19|access-date=2009-08-07|url=https://www.usatoday.com/news/health/2005-10-19-teens-technical-virginity_x.htm|archive-date=2011-04-28|archive-url=https://web.archive.org/web/20110428054421/http://www.usatoday.com/news/health/2005-10-19-teens-technical-virginity_x.htm|url-status=live}} including with regard to teenage girls who not only fellate their boyfriends to preserve their virginities, but also to create and maintain intimacy or to avoid pregnancy. Other reasons given for the practice among teenage girls are peer-group pressure and as their introduction to sexual activity. Additionally, gay males may regard fellatio as a way of maintaining their virginities, with penile-anal penetration defined as resulting in virginity loss, while other gay males may define fellatio as their main form of sexual activity.

{{See also|Islamic views on oral sex}}

Fellatio is legal in most countries. Laws of some jurisdictions regard fellatio as penetrative sex for the purposes of sexual offenses with regard to the act, but most countries do not have laws which ban the practice, in contrast to anal sex or extramarital sex. In Islamic literature, the only forms of sexual activity that are consistently explicitly prohibited within marriage are anal sex and sexual activity during menstruation.{{cite web |url=http://www.understanding-islam.com/q-and-a/social-issues/regarding-oral-sex-5555 |title=Regarding 'Oral Sex' |publisher=Understanding-islam.com |access-date=2013-03-14 |archive-url=https://web.archive.org/web/20130218214658/http://www.understanding-islam.com/q-and-a/social-issues/regarding-oral-sex-5555 |archive-date=2013-02-18 }} However, the exact attitude towards oral sex is a subject of disagreements between modern scholars of Islam. Authorities considering it "objectionable" do so because of the penis' supposedly impure fluids coming in contact with the mouth.{{cite web |url=http://www.zawaj.com/articles/fatwa_oral_desai.html |title=Articles and Essays |publisher=Zawaj.Com |access-date=2010-03-19 |archive-date=2018-10-04 |archive-url=https://web.archive.org/web/20181004154700/http://www.zawaj.com/articles/fatwa_oral_desai.html |url-status=live }} Others emphasize that there is no decisive evidence to forbid oral sex.{{cite web |url=http://www.islamonline.net/servlet/Satellite?pagename=IslamOnline-English-Ask_Scholar/FatwaE/FatwaE&cid=1119503543892 |title=Islam's Stance on Oral Sex - IslamonLine.net - Ask The Scholar |publisher=IslamonLine.net |access-date=2010-03-19 |archive-url=https://web.archive.org/web/20100324080602/http://www.islamonline.net/servlet/Satellite?pagename=Islamonline-English-Ask_Scholar%2FFatwaE%2FFatwaE&cid=1119503543892 |archive-date=2010-03-24 }}

In Malaysia, fellatio is illegal, but the law is seldom enforced. Under Malaysia's Section 377A of the Penal Code, the introduction of the penis into the anus or mouth of another person is considered a "carnal intercourse against the order of nature" and is punishable with imprisonment of 20 years maximum and whipping.{{cite news|newspaper=The Star|date=March 1, 2009|access-date=December 9, 2010|url=http://thestar.com.my/news/story.asp?file=/2009/3/1/focus/3375398&sec=focus|archive-url=https://web.archive.org/web/20110622074655/http://thestar.com.my/news/story.asp?file=%2F2009%2F3%2F1%2Ffocus%2F3375398&sec=focus|archive-date=June 22, 2011|title=Illegal but not abnormal}}

File:Depiction of fellatio on Attic red-figure kylix, c. 510 BC.jpg

Galienus called fellatio lesbiari since women of the island of Lesbos were supposed to have introduced the practice of using one's lips to give sexual pleasure.{{cite web |url=http://www.sacred-texts.com/cla/priap/prp105.htm |title=Priapeia, translated by Leonard Smithers and Richard Francis Burton: Irrumation |publisher=Sacred-texts.com |access-date=2010-03-19 |archive-date=2011-05-14 |archive-url=https://web.archive.org/web/20110514230255/http://www.sacred-texts.com/cla/priap/prp105.htm |url-status=live }}

File:KamaSutra08.jpg]]

The Ancient Indian Kama Sutra, dating from the first century AD, describes oral sex,{{cite web|url=http://www.kamashastra.com/kama209.htm |title=The actual kama sutra or kamasutra: Part II: On Sexual Union: Chapter IX. On Holding the Lingam in the Mouth by Kamashastra |publisher=Kamashastra.com |access-date=2010-03-19 |archive-url=https://web.archive.org/web/20100313043325/http://www.kamashastra.com/kama209.htm |archive-date=2010-03-13 }} discussing fellatio in great detail (the Kama Sutra has a chapter on {{lang|sa-Latn|auparishtaka}} (or {{lang|sa-Latn|oparishtaka}}), "mouth congress"){{cite web |url=http://badgerherald.com/artsetc/2003/04/09/the_ageold_question_.php |title=The age-old question: Spit or swallow? |date=9 April 2003 |publisher=The Badger Herald |access-date=2010-03-19 |archive-date=2011-09-28 |archive-url=https://web.archive.org/web/20110928073425/http://badgerherald.com/artsetc/2003/04/09/the_ageold_question_.php |url-status=live }} and only briefly mentioning cunnilingus. However, according to the Kama Sutra, fellatio is above all a characteristic of eunuchs (or, according to other translations, of effeminate homosexuals or trans women similar to the modern Hijra of India), who use their mouths as a substitute for female genitalia.{{Cite journal |last=Penrose |first=Walter |date=2001 |title=Hidden in History: Female Homoeroticism and Women of a "Third Nature" in the South Asian Past |url=https://www.jstor.org/stable/3704787 |journal=Journal of the History of Sexuality |volume=10 |issue=1 |pages=3–39 |doi=10.1353/sex.2001.0018 |jstor=3704787 |issn=1043-4070}}

Vātsyāyana, the author of the Kama Sutra, states that it is also practiced by "unchaste women", but mentions that there are widespread traditional concerns about this being a degrading or unclean practice, with known practitioners being evaded as love partners in large parts of the country. The author appears to somewhat agree with these attitudes, claiming that "a wise man" should not engage in that form of intercourse while acknowledging that it can be appropriate in some unspecified cases.{{Cite journal |last=Bastia |first=Binaya Kumar |date=2006 |title=Socio-cultural aspect of sexual practices and sexual offences – An Indian scenario |url=https://linkinghub.elsevier.com/retrieve/pii/S1353113106000344 |journal=Journal of Clinical Forensic Medicine |language=en |volume=13 |issue=4 |pages=208–210 |doi=10.1016/j.jcfm.2006.02.002|pmid=16564197 }}{{Cite journal |last=Nag |first=Moni |date=1996 |title=Paradox of eroticism and sexual abstinence in Hindu culture |url=https://www.tandfonline.com/doi/full/10.1080/11287462.1996.10800961 |journal=Global Bioethics |language=en |volume=9 |issue=1–4 |pages=171–185 |doi=10.1080/11287462.1996.10800961 |issn=1128-7462}}

The Moche culture of ancient Peru depicted fellatio in their ceramics.Berrin, Katherine & Larco Museum. The Spirit of Ancient Peru:Treasures from the Museo Arqueológico Rafael Larco Herrera. New York: Thames & Hudson, 1997.

In some cultures, such as Cambodia, Chinese in Southeast Asia, northern Manchu tribes along Amur River,{{cite book|url=https://books.google.com/books?id=KlMLAQAAMAAJ&q=%E6%BB%A1%E6%97%8F%E7%9A%84%E7%A4%BE%E4%BC%9A%E7%BB%84%E7%BB%87|title=Social Organization of the Manchus: a study of the Manchu clan organization (Chinese Translation)|author=Sergeĭ Mikhaĭlovich Shirokogorov|translator-last=Gao|translator-first=Bingzhong|others=corrected by Liu Xiaomeng|year=1997|publisher=Commercial Press|location=Shanghai|isbn=978-7-100-01912-5|pages=1, 12–13|access-date=2017-11-01|archive-date=2022-01-25|archive-url=https://web.archive.org/web/20220125035706/https://books.google.com/books?id=KlMLAQAAMAAJ&q=%E6%BB%A1%E6%97%8F%E7%9A%84%E7%A4%BE%E4%BC%9A%E7%BB%84%E7%BB%87|url-status=live}} Sambians in Papua New Guinea, Thailand, Telugus of India, Native Hawaiians and other Pacific Islanders, briefly taking the penis of a male infant or toddler into one's mouth was considered a nonsexual form of affection or even a form of ritual, greeting, respect, parenting love, or lifesaving.{{cite book|url=https://books.google.com/books?id=vMaNCgAAQBAJ&q=Telugu+baby+penis&pg=PA575|title=Introduction to Maternity and Pediatric Nursing|author=Gloria Leifer|year=2014|publisher=Elsevier Health Sciences|isbn=978-1-4557-7015-1|page=575|access-date=2020-10-25|archive-date=2022-01-25|archive-url=https://web.archive.org/web/20220125035737/https://books.google.com/books?id=vMaNCgAAQBAJ&q=Telugu+baby+penis&pg=PA575|url-status=live}}{{cite book|url=https://books.google.com/books?id=EwY_AQAAIAAJ|title=Social Organization of the Manchus: a study of the Manchu clan organization|author=Sergeĭ Mikhaĭlovich Shirokogorov|year=1924|publisher=Ardent Media|isbn=978-0-404-56946-4|pages=122, 123|access-date=2020-06-07|archive-date=2020-07-31|archive-url=https://web.archive.org/web/20200731153328/https://books.google.com/books?id=EwY_AQAAIAAJ|url-status=live}}{{cite book|url=https://books.google.com/books?id=sWboBAAAQBAJ&q=Banoi++genitals&pg=PA36|title=Parenting for a Peaceful World|author=Robin Grille|year=2014|publisher=New Society Publishers|isbn=978-1-55092-581-4|page=36|access-date=2020-10-25|archive-date=2022-01-25|archive-url=https://web.archive.org/web/20220125035707/https://books.google.com/books?id=sWboBAAAQBAJ&q=Banoi++genitals&pg=PA36|url-status=live}}{{cite book|url=https://books.google.com/books?id=SXvyCAAAQBAJ&q=chinese+fellatio+culture&pg=PA375|title=Normal and Abnormal Behavior in Chinese Culture: Volume 2 of Culture, Illness and Healing|author1=A. Kleinman|author2=T.Y. Lin|year=2013|publisher=Springer Science & Business Media|isbn=978-94-017-4986-2|page=375|access-date=2020-10-25|archive-date=2022-01-25|archive-url=https://web.archive.org/web/20220125035708/https://books.google.com/books?id=SXvyCAAAQBAJ&q=chinese+fellatio+culture&pg=PA375|url-status=live}} According to some sources, it was an ancient Chinese custom for grandmothers, mothers, and elder sisters to calm their baby boys with fellatio.{{cite book|url=https://books.google.com/books?id=lCA1kKWEw-EC&q=chinese+fellatio+boy&pg=PA63|title=Night Thoughts: Reflections of a Sex Therapist|author=Avodah K. Offit|year=1995|publisher=Jason Aronson, Incorporated|isbn=978-1-4616-2975-7|page=63|access-date=2020-10-25|archive-date=2022-01-25|archive-url=https://web.archive.org/web/20220125035708/https://books.google.com/books?id=lCA1kKWEw-EC&q=chinese+fellatio+boy&pg=PA63|url-status=live}}{{cite book |url=https://books.google.com/books?id=-sZrAAAAMAAJ&q=Masturbation:+from+infancy+to+senescence |title=Masturbation: from infancy to senescence |author1=Irwin M. Marcus |author2=John J. Francis |year=1975 |publisher=International Universities Press |isbn=978-0-8236-3150-6 |page=371 |access-date=2017-11-02 |archive-date=2022-01-25 |archive-url=https://web.archive.org/web/20220125035753/https://books.google.com/books?id=-sZrAAAAMAAJ&q=Masturbation%3A+from+infancy+to+senescence |url-status=live }} It has also been reported that some modern Chinese mothers have performed fellatio to their moribund sons as affection and means for lifesaving, because they culturally believe that when the penis is completely retracted into the abdomen, the boy or man will die.{{cite book|url=https://books.google.com/books?id=TUXzCQAAQBAJ&q=chinese+fellatio+boy&pg=PA8|title=Vietnamese Traditional Medicine: A Social History|author=C. Michele Thompson|year=2015|publisher=NUS Press|isbn=978-9971-69-835-5|page=375|access-date=2020-10-25|archive-date=2022-01-25|archive-url=https://web.archive.org/web/20220125035712/https://books.google.com/books?id=TUXzCQAAQBAJ&q=chinese+fellatio+boy&pg=PA8|url-status=live}}{{cite book |url=https://books.google.com/books?id=tA9sAAAAMAAJ&q=chinese+mother+boy+fellatio+abdomen |title=Handbook of Anxiety: Biological, clinical, and cultural perspectives |author1=Martin Roth |author2=Russell Noyes |year=1988 |publisher=Elsevier |isbn=978-0-444-90475-1 |page=314 |access-date=2017-11-03 |archive-date=2021-08-27 |archive-url=https://web.archive.org/web/20210827144406/https://books.google.com/books?id=tA9sAAAAMAAJ&q=chinese+mother+boy+fellatio+abdomen |url-status=live }}

{{Main|Animal sexual behavior|Non-reproductive sexual behavior in animals#Oral sex}}

File:Cynopterus sphinx fellatio no music.ogg

Flying foxes (a type of bat) have been observed engaging in oral sex.Sugita, N. (2016). Homosexual Fellatio: Erect Penis Licking between Male Bonin Flying Foxes Pteropus pselaphon. PLoS ONE, 11(11), e0166024. Indian flying fox males will lick a female's vulva both before and after copulation, with the length of pre-copulation cunnilingus positively correlated with length of copulation.Maruthupandian, J., & Marimuthu, G. (2013). Cunnilingus apparently increases duration of copulation in the Indian flying fox, Pteropus giganteus. PLoS ONE, 8(3), e59743. The fruit bat Cynopterus sphinx, has been observed to engage in fellatio during mating. Pairs spend more time copulating if the female licks the male than if she does not.{{cite journal|last=Tan|first=Min|author2=Gareth Jones |author3=Guangjian Zhu |author4=Jianping Ye |author5=Tiyu Hong |author6=Shanyi Zhou |author7=Shuyi Zhang |author8=Libiao Zhang |date=October 28, 2009|title=Fellatio by Fruit Bats Prolongs Copulation Time|journal=PLoS ONE|volume=4|issue=10|doi=10.1371/journal.pone.0007595|pmid=19862320|pages=e7595|pmc=2762080|bibcode=2009PLoSO...4.7595T|editor1-last=Hosken|editor1-first=David|doi-access=free}}{{cite web

|url=https://www.newscientist.com/article/dn18077-fellatio-keeps-male-fruit-bats-keen.html

|title=Fellatio keeps male fruit bats keen - life - 29 October 2009 - New Scientist

|publisher=www.newscientist.com

|access-date=2009-10-31

|archive-date=2015-04-26

|archive-url=https://web.archive.org/web/20150426103655/http://www.newscientist.com/article/dn18077-fellatio-keeps-male-fruit-bats-keen.html

|url-status=live

}} Male Livingstone's fruit bats have been observed engaging in homosexual fellatio, although it is unknown if this is an example of sexual behavior or social grooming.Courts, S. E. (1996). An ethogram of captive Livingstone's fruit bats Pteropus livingstonii in a new enclosure at Jersey Wildlife Preservation Trust. The Dodo: Journal of the Wildlife Preservation Trusts, 32, 15–37. Bonin flying foxes also engage in homosexual fellatio, but the behavior has been observed independently of social grooming.

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