In "The Return" by Jennifer L. Armentrout, the narrator experiences a profound emotional reaction to someone's smile. This smile is not just a simple gesture; it carries a weight that impacts him deeply, causing an unexpected and visceral response. The phrase captures the intense connection that can arise from such a seemingly small action, highlighting the power of nonverbal communication in human relationships.

The narrator's gut feeling signifies a significant shift in his emotions, suggesting that this interaction may lead to deeper feelings or a new understanding of love and attraction. The moment is pivotal, as it illustrates how a single smile can serve as a catalyst for introspection and change, laying the groundwork for further developments in the story.