Fellatio

Fellatio, also called fellation, is oral sex performed upon the penis. It may be performed to induce orgasm and ejaculation of semen, or it can be used as foreplay prior to vaginal or anal forms of intercourse. Fellatio, or, more precisely, fellating to the point of orgasm, is commonly referred to as a blow job. Fellatio is sometimes referred to as "giving head", although this term can also apply to cunnilingus. An alternative method of oral sex performed on men is irrumatio.

Some receivers regard receiving oral sex as an ego boost, believing that such an act is a form of dominance over their sexual partner because of the overt submissive nature of the act; the giver may often be on their knees before the receiver to perform the act of pleasure. In ancient Greece, fellatio was referred to as "playing the flute"; the Kama Sutra has a chapter on oparishtaka, or "mouth congress."