Masterful Professor Drex, in the heat of his office, can no longer resist the urge to stroke his throbbing cock. As he unzips his pants, his massive member springs free, already glistening with pre-cum. He grasps it firmly, his hand sliding up and down the veined shaft with increasing speed. His grunts fill the room as he edges closer to release, his balls tightening. With a final, powerful stroke, he erupts, thick ropes of cum shooting from his cock, coating the desk and his hand.