In "Shopgirl," Steve Martin explores the inner turmoil of the protagonist, whose mind is clouded with despair and confusion. The vivid imagery of blackness reflects deep emotional pain, suggesting that her feelings are profound yet difficult to articulate. It's a representation of loneliness and a longing for connection, encapsulated in the haunting question she struggles with: "Why does no one want me?" This sentiment exposes her vulnerability and desire for acceptance.

This internal dialogue reveals a complex emotional state that many can relate to. The blackness she experiences is not merely a thought but rather a deeper essence of her feelings that weighs heavily on her mind. It emphasizes the struggle of understanding one's worth and the universal quest for belonging, highlighting the stark reality of isolation that permeates her life in a world where she feels unnoticed.