Purring would seem to be, in her case, an automatic safety valve device for dealing with happiness overflow.
“God help me if I ever do another movie with an explosion in it. If you see me in a movie where stuff is exploding you'll know I've lost all my money.”
“The crucial question one comes back to is the examination; without that experience is meaningless. And I think it's true that society is becoming more and more passive, less and less fired up with enthusiasm, in many spheres.”