Oral sex is the stimulation of a man's or woman's genitals with the mouth or tongue.
Oral sex is an excellent way to perform foreplay or arouse a partner to orgasm.
Often referred to as going down on, giving a blow job, sucking or giving head, the medical terms are cunnilingus, where the woman's genitals are stimulated by the partner's mouth or tongue, and fellatio, where the man's genitals are stimulated by his partner's mouth and tongue. Couples who enjoy oral sex see it as a normal and pleasurable part of lovemaking, a powerful method of arousal for men and a softer and gentler form of stimulation for women. Oral sex is extremely normal and some research shows approximately 9 out of 10 people include it as part of their lovemaking. Not every couple likes oral sex and if you don't like it, don't practice it. Health experts point out that fellatio and cunnilingus both involve an exchange of bodily fluids, and that there is an element of risk of HIV or other STD transmission.