If you think about it, at first sight, it seems that Sally changes Harry as a part of their eventual relationship, as evidenced by the coconut layer cake mumbo jumbo. But Sally opens up and takes risk on a lot of crazy hijinks Harry starts. Really, it’s a relationship where both are changing each other to become more open to new experiences.
It makes me more hopeful about their future together!
(Oh, wait, it’s just a movie. Right. Nevermind.)