Anilingus (from the Latin anus + -lingus, from lingere, "to lick", and alternately spelled analingus, is an oral and anal sex act where one person stimulates the anus of another person by the use of their mouth, lips, tongue or teeth. It is also referred to as analâ€“oral contact and analâ€“oral sex, or colloquially as rimming. Anilingus can be performed by or on people of any sexual orientation for personal pleasure or as a form of erotic humiliation. Pleasure for the giver is usually based more on the principle of the act.The anus has a relatively high concentration of nerve endings and can be an erogenous zone, and the receiver may receive pleasure from external anal stimulation, as well as from the surprise element. The person receiving anilingus is regarded as the passive partner in the act, and the person performing anilingus is the active partner. People may engage in anilingus for its own sake, before anal fingering or penetration, or as part of foreplay before sexual intercourse. Oral sex, including anilingus, is widely considered a taboo act, or at least frowned upon, in many cultures and parts of the world, at times associated with humiliation. Some people are sexually inhibited in performing the act or having it performed on them, or both. According to Diamant, Lever and Schuster, anilingus is a more rare sexual practice between women.