Answer:
"Sonnet 130" details the beauty of the mistress but all in the negative way. The comparison of the features, the breath, the hair, the cheeks etc all are shown to be the worst of what they are supposed to be. All these details about the mistress pokes fun at the very essence of a sonnet form.
Explanation:
William Shakespeare's "Sonnet 130" is quite unlike the regular sonnet form. This sonnet rather demerits the beauty of the lover, while sonnets are most famous for their romantic love themes. Shakespeare's sonnet instead labels everything about the lover as the worst or in the bad light.
Sonnet 130 begins with the description of the mistress' eyes as nothing like the sun. Then he moves on to list the bad qualities of all that is seen in the mistress. He makes her features seem less ideal, demeaning their importance and significance.
Except for the last couplet "And yet, by heaven, I think my love as rare / As any she belied with false compare", the whole sonnet in itself is a parody/ satire of the sonnet form.
