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"Adult Play" describes all consensual erotic activities between adults that go beyond classic intimate encounters.

A anal plug (often referred to as a 'butt plug') is a specially shaped sex toy designed to gently stretch and pleasantly stimulate the anus.

An anal dildo is a specially shaped sex toy used for anal stimulation.

Anal intercourse refers to the sexual practice in which the anus of a partner is stimulated or penetrated with fingers, toys, or the penis.