There is no specific mention in the story "Should Wizard Hit Mommy?" about which part Jack himself enjoyed the most. However, we can infer that Jack might have enjoyed the part where the wizard comes to visit him and his mother.

Summary:
"Should Wizard Hit Mommy?" is a short story written by John Updike. It revolves around the character of Jack, a four-year-old boy, and his imaginative world. Jack has a vivid imagination and creates a fantasy world where a wizard lives in his house. He often pretends to be a superhero and enjoys his make-believe adventures.

Short Q and A:
1. What is the story "Should Wizard Hit Mommy?" about?
- The story is about a four-year-old boy named Jack and his imaginative world.

2. What is Jack's favorite part of the story?
- There is no specific mention of Jack's favorite part in the story.

Long Q and A:

Explanation of the story "Should Wizard Hit Mommy?":
- The story begins with Jack's mother, who is a single parent, struggling to manage her everyday life and take care of Jack.
- Jack creates a fantasy world where a wizard lives in his house. He believes that the wizard has magical powers and can protect him and his mother.
- Jack often pretends to be a superhero and enjoys his make-believe adventures.
- The story explores the theme of a child's imagination and the impact it has on their perception of reality.
- As the story progresses, Jack's mother starts dating a man named David, which creates a conflict in Jack's fantasy world. He becomes worried that the wizard might hit his mommy because he is jealous of David.
- Jack's fear and confusion are portrayed through his conversations with the wizard and his mother.
- In the end, Jack realizes that his mother's relationship with David is not a threat and that the wizard will not hit mommy.
- The story concludes with Jack accepting the reality of his mother's new relationship and returning to his imaginative play.

Overall, the story "Should Wizard Hit Mommy?" focuses on the imaginative world of a young boy and how he navigates the complexities of his emotions and perceptions. While there is no specific mention of Jack's favorite part, it can be inferred that he enjoys the parts where he interacts with the wizard and experiences his make-believe adventures.