Not a particularly well-known song which was originally a B side and not on any of their original albums, it's actually particularly musically advanced for the time. A pity that George Martin didn't get them to do a few extra takes of the vocals, as the difficult harmony signing which starts the song sounds...difficult. The song, which deserves to be more talked about, contains interest and variety in its melody, rhythm, harmony and arrangement. In its way this is truly a masterpiece.