Snape chuckled, dark and warm as coffee. He necked back his own testtube and set it aside, as his free hand drifted up, fingertips sifting featherlight through Al's hair. "I'm glad you like it." He tilted his head and added, "You noticed more about that than before, didn't you? Back when you were loading everything with sugar, do you think you would have tasted and smelled all those nuances?"