Perhaps the most well-known parallel between theatricality and metaphors can be found in William Shakespeare's play 'As You Like It." The opening line from Jaques soliloquy in Act II, scene vii is "All the world's a stage."
Given that theatricality is revolves around the staging of a story, or the exaggeration of self-display, the appearance of metaphors in theater is understandable. By using metaphors, a play can speak to the watchers by creating comparisons which create connections, humor, and illustrate sarcasm.
Typically, metaphors create images for readers. These written metaphors allow readers to understand a particular idea or object through its likeness to something else. That being said, the use of metaphoric language on stage can go very right or very wrong. Given that plays exist as visual presentations of a text, the misuse of a metaphor can cause confusion for a watcher of the play. On the other hand, when a metaphor is created well, it adds to the theatricality of the action.