In the book "Infinity" by Sherrilyn Kenyon, there is an intriguing exchange between the characters Nick and Mark. Nick describes a peculiar and unpleasant odor, comparing it to a mix of three-day-old cat vomit and rotten asparagus. This description highlights the foulness of the smell that lingers in the air. Mark then reveals the source of this odor, explaining that it is duck urine, which he uses as a tactic to deter zombies from perceiving him as human. Although this method is practical for survival, it raises concerns for Mark regarding Nick's sanity in his choice of scent. The dialogue effectively captures the dark humor often found in zombie narratives while illustrating the lengths characters go to stay alive.