Sunday Morning by Maroon 5 is a soulful love song that describes the mixed emotions and depth of a romantic relationship. The song captures the tenderness and intimacy of spending a lazy Sunday morning with a loved one, intertwined with the complexities and ups and downs of love. The recurring theme is the comfort and security found in the presence of a partner, as well as the yearning and need for their presence. Key moments in the song include the heartfelt lyrics about missing someone and the vivid imagery that brings the listener into the cozy and emotional atmosphere of Sunday mornings spent together.