[holds still again, letting Rolo's fingers wander]
Ah, there are actually different ... hmmmm, sounds of happiness that people make, if you will. When they're excited, people tend to be loud and boisterous, exaggerating their features. That's the sound that I've learned to wear over the years. My ... mask. But I don't always wear it as a mask. More and more, it becomes real.
Quiet happiness tends to be more subtle; like Rolo-kun said, more fluid. That fluidity, the small things that vary from person to person that allow them to be content, can sometimes be the greatest impact on a person even if they only make the most minute change ...