In "Aunts Aren't Gentlemen" by P.G. Wodehouse, the story revolves around Bertie Wooster and his comedic escapades. The narrative is filled with humorous situations, misunderstandings, and the charming chaos that often ensues in Wooster's life, particularly involving his well-meaning yet overbearing aunts. The book captures the essence of Wodehouse's writing style, which is characterized by wit and clever dialogue.

The phrase "a chap after the horses" reflects the playful nature of the characters and their preoccupations. It hints at the social pursuits and eccentricities that define their interactions, illustrating how Wodehouse masterfully intertwines themes of friendship, ambition, and the absurdities of aristocratic life. Overall, the novel is a delightful romp that embodies the humor and charm of early 20th-century British literature.