Over more than a decade, his friend, who was "always rather naive," had "gone brain-dead." Tsai felt very sorry for his friend, and so wrote this song.
十幾年下來，「原來『古意』的朋友腦筋已經 PA-DAI 了（腦筋不靈光）」，蔡振南為這位朋友感到難過，因而寫歌。