The black and white nap cartoon style usually emphasizes the play of light and shadow. It can give a retro or artistic feel, and might be used to evoke a certain mood or create a sense of mystery.
The image of a cartoon man in an armchair might symbolize comfort and a sense of security. It could also imply that he's in a thinking mode or just enjoying some downtime. Different interpretations can depend on the context and style of the cartoon.