The kindness of stylists

I just want to say that I have the kindest, smartest hair stylist in the world. This weekend when I got my hair cut, I told him I was worried that my very thin hair seemed to be falling out at a faster rate than usual. "Oh, don't worry about that," he said. "It's just the old hair making way for the new hair." He didn't skip a beat. How did he know to say this perfect thing?