Oral sex consists of all the sexual activities that involve the use of the mouth, tongue, and possibly throat to stimulate genitalia. It may be used as foreplay before intercourse, as climax of a sexual act, during, or following intercourse. It is sometimes performed to the exclusion of all other forms of sexual activity. Oral sex may or may not include the ingestion or absorption of semen and/or vaginal fluids. Ingestion of these fluids alone, without physical mouth-to-genital contact (e.g., the extreme form of facial known as bukkake), is not considered to be oral sex—although it remains an extreme erotic practice nevertheless. Common slang terms for oral sex include "going down on," "giving head to," "giving a blowjob to" (male recipient), "blowing" (male recipient), "eating out" (female), "licking out" (female) or "sucking off" (male) a sexual partner.
- Cunnilingus refers to oral sex performed on a woman
- Fellatio refers to oral sex performed on a man.
- Analingus refers to oral stimulation of a person's anus