How do penis exercises work? Well, this method works by you using your hands and doing specific stretching, massaging, and pulling techniques. These safe and gentle routines (which were designed by medical professionals by the way) will end up enhancing every single area of your manhood that requires enhancement in order for you to grow bigger, stronger, and healthier. This means your corpora cavernosa chambers, your corpus spongiosum chamber, your PC muscle, and blood circulation. Stone Force supplement will increase your stamina and improve your performance in bed.