Gurney proposes a Darwinian explanation for this. Beautiful music arouses an emotion that is unlike any other because it produces an unconscious association with the sexual emotion experienced by our forebears (Gurney 1880: 116 ff.). However, Gurney points out an important limit of this explanation: the Darwinian account cannot explain why only beautiful music arouses such an emotion, as it posits a connection between musical phenomena in general and the arousal of that emotion (Gurney 1880: 121