(A pesar de todo, me lo encuadernó y quedó demasiado bien como para guardarlo sólo en mi cabeza).
I know I've been too persistent with the smile thing, but I want you to realize that it really is important. You feel a lot better if you laugh and smile more often. Although maybe it only happens to me and I'm generalizing. I always smile at people, but just because if I don't, I feel really bad. My body needs my smile to feel more comfortable, and the thing is, it makes the other person comfortable too.
Of course, I'm not saying a person can't be nice without smiling. You don't really need to smile, because the real thing that tells the other person if you're nice or not, is the look in your eyes. The solution: just tell your heart to smile.