Final answer:
Without specific context, it's difficult to pinpoint why Sherman is jealous of "King Butt." Generally, jealousy arises from feelings of inadequacy, being threatened, or fear of loss in literature.
Step-by-step explanation:
The context of Sherman being jealous of "King Butt" is not provided, which makes it difficult to offer a specific reason for Sherman's jealousy. However, if we consider common reasons for jealousy in literary narratives, they often include feelings of being outshined, threatened, or insecure in comparison to another character. Jealousy can arise when one character receives more attention, praise, or success than another, leading to a sense of inadequacy or fear of losing something valuable to them, such as a position of power or a relationship.