"Cuckoo (Insanity)" is a song by the British band The Kooks, featured on their album "Inside In/Inside Out." The track explores themes of mental health and emotional struggles, using metaphorical language to convey feelings of confusion and disconnection. The song's upbeat melody contrasts with its serious subject matter, creating a dynamic listening experience. It reflects the challenges of navigating one's thoughts and emotions, resonating with listeners who may have faced similar issues. Overall, "Cuckoo (Insanity)" combines catchy rhythms with poignant lyrics, making it a memorable piece in The Kooks' discography.