Dear Boy by Paul McCartney is a heartfelt song that reflects on a past relationship, offering a sense of closure and reflection. The lyrics center on McCartney addressing someone who did not appreciate their partner until it was too late. Key themes include regret, hindsight, and gratitude for the love McCartney found after the relationship ended. A particularly poignant moment is when McCartney expresses his happiness and appreciation for finding true love despite past heartbreak, indicating a sense of personal growth and moving on.