In fellatio the -us is replaced by the -io; the declension stem ends in -ion-, which gives the suffix the form -ion cf. 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 may be termed a fellator; because of Latin's gender based declension , this word may be restricted by some English speakers to describing a male. The equivalent term for a female is fellatrix. Fellatio can be sexually arousing for participants, and males commonly experience orgasm and ejaculation of semen during the act.
When the penis is thrust into someone's mouth, it may be called irrumatio , though the term is rarely used. The man's partner may also orally play with his penis by licking, sucking, kissing or otherwise playing with the tongue and lips.
Different people have different sensitivities to the reflex, but some people learn to suppress the reflex. Deep-throating is an act in which a man's partner takes the entire erect penis deep into their mouth, in such a way as to enter their throat.
The Triumph of Love over Rage, suggests that swallowing semen is high on a man's intimacy scale. Giving and receiving fellatio may happen simultaneously in sex positions like 69 and daisy chain. Fellatio is sometimes practiced when penile 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.
It is physically possible for men who have sufficient flexibility, penis size or a combination of the two to perform fellatio by oneself as a form of masturbation ; this is called autofellatio. Few men possess sufficient flexibility and penis length to safely perform the necessary frontbend.
Taste and odor It may be that "few women praise the taste" of semen. 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.
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. The study found that 36 percent of the cancer patients had HPV compared to only 1 percent of the healthy control group.
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 percent increased risk.
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. At any rate, acids in the stomach and digestive enzymes in the digestive tract break down and kill spermatozoa. Clinical research has tentatively linked fellatio with immune modulation,  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. Semen ingestion has had central importance in some cultures around the world. In Baruya culture, there is a secret ritual in which boys give fellatio to young males and drink their semen, to "re-engender themselves before marriage".
By the time he enters mid-puberty he in turn participates in passing his semen on to younger males. 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 menstrual cycles. Authorities considering it "objectionable" do so because of the penis's supposedly impure fluids coming in contact with the mouth.
Under Malaysia's Section A 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.
However, according to the Kama Sutra, fellatio is above all a characteristic of eunuchs or, according to other translations, of effeminate homosexuals or transwomen similar to the modern Hijra of India , who use their mouths as a substitute for female genitalia. 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.
The religious historian Mircea Eliade speaks of a desire to transcend old age and death and achieve a state of nirvana in the Hindu practice of Tantric yoga. In Tantric yoga, the same emphasis is placed on the retention and absorption of vital liquids; the Sanskrit texts describe how semen must not be emitted if the yogi is to avoid falling under the law of time and death. They depicted fellatio in their ceramics.