What are your thoughts on including poetry in prose? I've seen a few different examples of it in published fiction, some that I think worked out better than others. Brian Jacques did a good job with the various songs, poems and prophecies, of which there were always several per book, in his Redwall series.
I have a couple of instances where I've incorporated poetry into my prose. In the first book of my Faerie duology, a minor character is a Pooka who speaks exclusively in rhyming couplets; in the second, a father sings a lullaby to his daughter. The second example falls under Stylistic Suck, as the singer is by no means a poet, and made up the song off the top of his head; I've tried to reflect that in the lullaby itself, which is rife with imperfect rhymes. The Pooka is more adept at rhyming on a dime.
Do any of you include poems in your prose?