Why does ponyboy feel out of things after he asks the others why they like fights?

Ponyboy feels out of things after he asks the others why they like fights because he struggles to understand the violence and aggression that define much of the Greaser lifestyle. His introspective nature makes him question the rationale behind the gang's actions, leading to feelings of alienation. This moment highlights his desire for deeper connections and reflects his internal conflict between fitting in and maintaining his own values. Ultimately, it underscores his sense of isolation within the group.