It's good to show interest in other people's interests.
Joe has a crush on his classmate, Lisa, and is about to approach her to strike up a converstation.
Joe wants to ask Lisa out on a date.
Joe asks Lisa about the things she likes to do before asking her out.
Joe ignores what Lisa is doing and talks about himself, then asks her out.
Lisa agrees to go out with Joe because he seems to be interested in the same things she is.
Lisa turns him down because he seems self-centered and boring.