Mirror by Ne-Yo is a sensual R&B song that delves into themes of intimacy and self-reflection. The song portrays a moment of deep connection between two lovers, using the metaphor of a mirror to emphasize the intimate and often unspoken bond shared. Key themes in the song include passion, desire, and the exploration of vulnerability within a romantic relationship. Poignant moments in the song come through in the lyrics that describe the act of watching oneself in a mirror, symbolizing not only the physical connection but also a deeper understanding and acceptance of oneself through the eyes of a partner.