The 'don't judge a book by its cover' lesson
Somehow I find it hard to believe that a woman who suffers from a disease which leaves her hairless would be so amazed at the revelation that you shouldn't judge a book by its cover. She seems so surprised to discover that people shouldn't be judged only by their appearance, because they can't necessarily choose how they look, and perhaps that person who looks a little different from her usual taste in men is actually a nice guy.
I mean, of all characters, it seems the least likely for her not to have learned this lesson a long time ago, since there many people probably treat her differently for being bald (not saying she is not beautiful of course).
I don't know, I guess I was just hoping for a stronger conclusion to the movie..