* To create a sense of anticipation. When a title is based on an image that appears in the middle of the poem, it can create a sense of anticipation in the reader. This anticipation can make the reader more likely to pay attention to the poem and to look for connections between the image and the rest of the poem.
* To add complexity and depth to the poem. By using an image from the middle of the poem as a title, poets can add complexity and depth to their poems. This can make the poem more open to interpretation and allow readers to form their own connections and meanings.