Why did they call the dog You Know What in an ostensibly serious war film?

In the film, the dog is named "You Know What" as a form of dark humor, reflecting the absurdity and chaos of war. It serves to lighten the heavy themes of the narrative while also highlighting the bond between the characters and their need for companionship amid the horrors they face. This unconventional naming choice underscores the surreal nature of their experiences, offering a moment of levity in an otherwise serious context.