Like an animal, his head almost perks up at the sound, nearly straining to experience more of it in any way he knows how - but this is new, still so new, and so he treads lightly, not sure of what will make her gasp versus cry out in delight, make her fingers strain for a grasp on his head the way they are now, curling deep enough for him to feel her nails lightly scratching against his scalp. He responds to her move with one of his own, emboldened by her responses, and prays he'll somehow stumble upon the right pattern that will leave her unable to form a single word.