My mistress' eyes are nothing like the sun; coral is far more red than her lips' red; if snow be white, why then her breasts are dun; if hairs be wires, black wires grow on her head.; i have seen roses damasked, red and white, but no such roses see i in her cheeks; and in some perfumes is there more delight than in the breath that from my mistress reeks. i love to hear her speak, yet well i know that music hath a far more pleasing sound; i grant i never saw a goddess go; my mistress when she walks treads on the ground. and yet, by heaven, i think my love as rare as any she belied with false compare. the lines "my mistress' eyes are nothing like the sun; / coral is far more red than her lips' red; / if snow be white, why then her breasts are dun; / if hairs be wires, black wires grow on her head" employ a humor device. identify the device used and discuss its effect on the meaning and tone of the poem?