Tell Me Why by The Beatles is a song that explores the complexities of romantic relationships, particularly focusing on misunderstandings and emotional hurt. The key themes of the song include confusion, heartbreak, and a longing for clarity in communication between partners. One poignant moment is when the singer repeatedly asks 'Tell me why you cried,' highlighting the frustration and desire for understanding. The overall message of the song conveys the struggle to comprehend the reasons behind emotional pain in a relationship.