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The man's partner may also orally play with his penis by licking, sucking, kissing or otherwise playing with the tongue and lips.It is difficult for some people to perform fellatio, due to their sensitivities to the natural gag reflex.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.However, increased flexibility achieved via gravity-assisted positions, and physical training such as gymnastics, contortion, or yoga may make it possible for some.It may be that "few women praise the taste" of semen.
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.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.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.
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The essential aspect of fellatio is for a man's sex partner to take his penis into their mouth, and then move their mouth up and down the penis to a rhythm set by them mimicking the thrusting motion of vaginal or anal intercourse, with saliva acting as a lubricant, and being careful not to bite or scratch with the teeth.