He looks mortally offended by the squeak, and doubly so by her encroachment. "Here's one for you. Have you ever heard the saying, 'Look with your eyes, not with your hands?' It's a popular one with small children, who are generally considered capable of internalising it." He thinks he can hear echoes in what she's saying, about ink spreading and transcending, what nonsense, making him bristle without quite being able to put a finger on why. Is that what she thinks he is? Transcending his use? "Why can't I feel both?"