why do we enjoy poetry From the perspective of neuroscience?

[Alan V]

How do we enjoy prose, poetry or any kind of literary arts?
From the perspective of neuroscience?
What is the deep origin of tasting metaphor?

I think you have to take poetry in context.  We humans enjoy exercising all of our many skills, the writing and reading of word- and meaning-games among them.  I would guess this desire to excel at all things has been very useful evolutionarily, even when its specific results aren't necessarily useful in every situation.  We are still exercising our abilities regardless.

As for the question of how charged meat cells in certain arrangements hold meanings, I would assume it's the same way arrangements of black marks on papers hold meanings.  Just as with books and language, our brains have their own language which we constantly interpret with yet other parts of our brains, since we have the capacity to impute meanings to abstractions.  Even if we don't know how the brain-language was written, we can still apply it.

I'm not sure neuroscience is useful in understanding such things beyond a point, however.  That seems like applying a hammer where you need a sizing gauge.