Amateur girls are working up a sweat at a fitness club. The instructor is giving them gentle guidance, but for some reason, they are troubled by the instructor's crotch right in front of them. They are so curious that they can't take their eyes off his crotch. When a hard cock is pressed against their ass, visible even through their leggings, or when a fully erect cock is shown to them, Amateur girls lose all sense of reason and go for the cock.