He groaned with what sounded like frustration and need. "It’s not difficult, Hermione. Just...suck it for Merlin’s sake." So she did, nervousness threading through her. She tried to remember the diagrams and techniques she’d discovered in books she’d read sitting in a private corner of a Muggle library – too embarrassed to get the books out, too worried her parents might find them and make assumptions. And now they seemed to be good techniques, he seemed to like it. She wasn’t failing terribly.