You’d like her. I mean if you tell old Phoebe something, she knows exactly what the hell you’re talking about. I mean you can even take her anywhere with you. If you take her to a lousy movie, for instance, she knows it’s a lousy movie. If you take her to a pretty good movie, she knows it’s a pretty good movie.
– J. D. Salinger
The Catcher in the Rye. Chapter 10, the first time Holden speaks about his younger sister Phoebe at length. His words show how much he cares about her. He loves her because he can easily connect with her.