Oral coitus, also known as oral sex or oral intercourse, is the sexual stimulation of an individual’s genitalia by his or her partner’s mouth. Some of its slang terms include giving head and getting domes. This may be done as a foreplay or as the focal intimate act. Specifically, cunnilingus is sexual stimulation performed on the vagina; its slang terms include muff diving and poon-job. On the other hand, fellatio is the stimulation performed on the penis; its slang terms include blow job and playing the skin flute. Sexually transmitted infections can be passed on through oral coitus (though the risk is lower as compared to other kinds of coitus).