He shifts around as she takes his boxers off completely, very much calm and collected up until the point she bends down and he feels something warm and pliant pressing against his cock. It doesn't take him long at all to realize it's actually her tongue, and he lets out a loud moan as she licks all the way to the tip, a hand fisting the sheets hard as he grinds his teeth, heels digging into the mattress, feeling a surge of adrenaline a little too strong spreading across his body.

"Shit. Give me... a moment."

He's not losing his control completely here, but the sheer unexpectedness of her action nearly had his heart leaping out of his chest for a second there.