Baby's Request by Paul McCartney is a nostalgic and romantic song that harkens back to the style of classic jazz and swing ballads. The song's lyrics describe a heartfelt request from a loved one, asking for a performance of their favorite song. The key themes include love, longing, and sentimental memories. The song uses the metaphor of a musical request to express deep affection and the desire to recreate cherished moments. Particularly poignant moments in the song include the verses where McCartney channels the heartfelt emotions of the requester, capturing the essence of romantic nostalgia.