She doesn't go to scary movies or listen to scary stories because she's a total baby about that stuff.
Scary stories, even stupid celebrity ghost stories make her look at everything differently; dark corners, lengthening shadows, the new Vegetarian Times magazine. All friggin' creepy.
Let's end with a joke, shall we?
This one comes courtesy of Susan's old man:
How do we know that the invisible man didn't have any children?
Because he wasn't apparent.