The quote humorously reflects the speaker's surprise and admiration that a young person is engaged in reading a book that is not part of the popular "Fifty Shades of Grey" series. It suggests a contrast between the common reading choices of youth and more substantial literature, highlighting the speaker's appreciation for the latter.
This sentiment reveals a broader concern about the reading habits of younger generations, implying that there is a lack of engagement with meaningful stories. It emphasizes the importance of diverse reading choices and the potential benefits of exploring literature that challenges and inspires readers.