"The Wasp Factory" by Iain Banks features a unique character who exhibits a dark sense of humor. One notable quote is, "I'm doing fine. I eat dogs! Heh heh heh!" This line captures the protagonist's eccentricity and unsettling personality, which is central to the book's exploration of identity and morality. The character's lighthearted yet disturbing admission highlights the juxtaposition between normalcy and the unusual aspects of their life.

The narrative delves deep into the psyche of its characters, using such quotes to underline themes of isolation and unorthodox behavior. The blend of humor and horror serves to engage readers while revealing the complexities and dark realities of the protagonist's existence. Through this lens, Banks crafts a compelling story that invites introspection and challenges conventional notions of sanity and normality.