Ever since I've had my hair coloured, I've been happier. I wonder why that's so. Why is my happiness and mood so contingent upon my physical appearance? If that's true, that would seem to suggest that I'm shallow, unable to see past my normal self and be the brave, confident, cheerful girl that has emerged a few days ago. Yet, I don't think any differently. I just... talk a little differently, and smile more. How can those small changes have such a huge effect?