The Sun Also Rises:
The episode title is an allusion to the 1926 novel The Sun Also Rises by Ernest Hemingway. It tells the story of a WWI veteran who becomes a journalist. During that time he begins to live an isolated life. Some say its because he couldn't handle the war, and thus was "less of a man."
Similarly, in this episode, Earl is emasculated by Robbie when Robbie wins the right to be head of the household.