In Sinclair Lewis's novel "Dodsworth," a character uses a playful yet pointed smile while questioning why someone didn't enjoy a pleasant stroll. This interaction reflects a sudden shift in emotion, highlighting how quickly one's demeanor can change, akin to a rubber band snapping back after being stretched. It invites the reader to consider the underlying motivations and feelings behind seemingly simple social exchanges.

The quote also suggests that sometimes, people might overlook the simple joys in life, such as taking a nice walk. It underscores the importance of appreciating small moments and the complexities of human interactions, where a smile can convey both warmth and subtle criticism. Thus, the dialogue encapsulates themes of social expectations and personal satisfaction within the narrative of "Dodsworth."