Reptilia by The Strokes is an energetic rock song that explores themes of frustration, confrontation, and emotion. The lyrics depict a strained relationship where the protagonist feels trapped and overwhelmed. The term 'Reptilia' metaphorically references the reptilian brain, which governs instincts and primal reactions like aggression and fear. Key moments in the song include the lines 'Please don't slow me down if I'm going too fast' and 'The room is on fire as she's fixing her hair,' which emphasize a sense of urgency and tension. The melody and rhythm, coupled with the intense lyrics, create an atmosphere of raw emotion and intensity, making the song relatable to those experiencing similar complex feelings.