Exactly correct. Those that are experienced and know the way around a guys, cock, balls, sweet spot, and prostate can pretty much make a guy lose it when they want him to.
She didn't like him filming her. So she made quick work of him. I've had that experience once too. She wanted to go home early, so she did the same thing she did here. One hand stroking, and the other caressing the prostate and balls. They know exactly where to push a man to shoot as fast as possible. Wonderful sensation, but very fast.