Cunnilingus is the act of using the mouth to stimulate the female gentials. This can include sucking or licking the outer and inner areas of the vagina, and most often involves direct stimulation of the clitoris. Some women find cunnilingus to be the most satisfying sexual act. Indeed, a great number of women report that oral sex is the only way they can achieve orgasm. The mouth can create a uniquely intense range of sensations which many find unrivaled.