Stiles smiles briefly at the touch, then catches Derek's hand and laces their fingers together, sandwiches Derek's hand between both of his. "You're not going to hurt me," he says, firmly. "Other!you never did. And even if the other werewolves here have to resort to potions or magic to stay human, I know you won't have to. You're strong, Derek." He sneaks a glance at Derek's face to meet his eyes, firm in his conviction. "I trust you."