Sabazius in the Aeneid (7.431-60)

The sensual bedroom epiphany of the Fury Allecto, by which Amata is driven into a Bacchic frenzy, resembles the initiation ritual of the cult of Sabazius, a "sacred marriage" in which a metal snake was dropped down the front of the initiand's clothes. This Thraco-Phrygian deity had a small but persistent presence in the Roman empire (attested in the army as early as the first century BC, and also at Pompeii), and was frequently identified with Dionysus. Virgil seems to have known of this cult and integrated it into the symbolic economy of the poem, in which feminine, sensual, oriental (including Phrygian) and ecstatic elements are opposed to the masculine self-control of the protagonist and his descendants.