Tiny Bubble by Paul McCartney is a song that explores themes of love, nostalgia, and the fragility of happiness. The song uses the metaphor of a 'tiny bubble' to represent fleeting moments of joy and the delicate nature of relationships. McCartney reflects on past experiences, highlighting both the beautiful and transient aspects of life. Key poignant moments in the song include lyrics that evoke images of cherished memories and the inevitable passage of time. Overall, the song resonates with listeners by capturing the bittersweet essence of love and life's ephemeral pleasures.