In praising his dark mistress, the poet observes that beauty standards have reversed: once blackness was shameful, but now dark beauty reigns, and this revolution in taste redeem her eyes.
Shakespeare wrote in a time of extreme cosmetic standards: pale skin was prized, achieved through dangerous lead makeup. His Dark Lady inverts this, suggesting that either beauty is objective and he loves despite convention, or that beauty is entirely constructed. The poem questions whether we ever truly see beauty or merely the fashionable mask of the moment. This anticipates modern critiques of media-driven beauty standards.
Lines 5-8 attack 'art's false borrowed face'—the cosmetics and artifice women used to whiten their skin. By contrast, the Dark Lady's natural beauty needs no enhancement. Yet the conclusion (she mourns becoming) suggests her darkness suits her as perfectly as mourning clothes, implying her beauty is a costume too, just a darker one. Shakespeare's argument collapses its own binary.
Like how TikTok beauty standards have dramatically shifted in favor of natural skin over filtered perfection, the poem observes that what was once considered ugly—dark skin, unadorned features—becomes suddenly desirable. The culture changes overnight, and yesterday's cosmetic sins become today's authenticity.