Sadness and darkness are natural cousins. Since ancient times, people have worn black to express their grief. Happiness is attracted to sunshine and depression to darkness. There is a certain romance in darkness and melancholy. There is something mysterious about that which is hidden and unknown. Dark poems may seek to romanticize sadness and depression. Other dark poems are simply poems about sad subjects. The poem "The Raven" by Edgar Allen Poe is an example of a delightfully spooky dark poem. There is much room for creativity in this genre.