Literary Device Spotlight:
Extended Metaphors, and How to Use Them in Your Writing
Extended Metaphors - Definitions and Examples for Your Reading Pleasure
Extended metaphors are an engaging literary device to use in writing plain, oftentimes boring, expository essays - just because you are writing an expository essay, doesn't mean it has to be dry.
Read on for an A++ essay example using the five senses as an extended metaphor for friendship, plus other engaging examples from both poetry and prose (plain writing - novels, short stories, etc.).