He can't help letting out a choked gasp at that, his lungs filling with air all at once, held in there for a while as his back arches, his whole body tenses, his knees shifting farther apart. His free hand covers his mouth for a moment, curling into a loose fist as he digs his teeth lightly into his knuckles, anything to allow himself to enjoy the feeling of her lips on him, her tongue swirling around the sensitive head of his cock.