Good, thinks Priestly, exactly like that: an emphatic voice saying 'good' in his head. If he's doing this right, John should be trembling and breathless and right on the edge right now, and he knows he's doing it right. He presses with the flat of his tongue, then flicks and swirls it and sucks him down again, one hand still grinding into his hip and the other between his legs, cupping and stroking his tightening balls.