In "About a Boy" by Nick Hornby, the concept of personal space is explored through the metaphor of a bubble. Each person has their own individual world, where they can feel secure and comfortable. However, attempting to intrude into someone else's bubble disrupts that delicate space and can lead to discomfort or conflict. This highlights the importance of respecting boundaries in relationships.

The idea suggests that genuine connections need to be formed voluntarily and authentically, rather than through forceful means. Acknowledging that everyone has their own sphere of experiences and emotions emphasizes the value of patience and understanding in building meaningful interactions.