Throughout the poem, My Last Duchess, Browning establishes the concept of human jealousy rooting from insecurity. The message is conveyed through the voice of the duke, whose jealousy is evident in the punctuation usage and rhythm scheme of Browning. The poem starts off in a iambic pentameter rhyme, which is allowing the poem to start with an even tone. This tone gives the reader a sense of calm and level-headed discussion. However, as the poem continues, we see a break from the normal scheme in the form of double hyphens. These hyphens separate the duke’s inner thoughts and the duke’s outer mask of diplomacy. He combines what he is saying and what he is thinking as in “She thanked men, --good! But thanked somehow -- I know not how”. This break
