"Black Dog" is a song steeped in themes of lust, eroticism, and betrayal, echoing traditional blues narratives. The lyrics tell the story of a man consumed by a woman, unable to resist her allure despite her ultimately deceptive intentions. She spends his money and uses him, revealing her true colors when she talks of becoming a star, leading him to a cold realization of her lack of soul. The song's title, however, is a playful reference to a black Labrador Retriever that would wander the Headley Grange studio grounds, disappearing at night and returning exhausted each morning, suggesting its own nocturnal adventures. It's a track that captures the raw, often complicated dynamics of desire and disillusionment.