The vacuum pump can temporarily enlarge the penis. However, using it too often or for too long can damage the elastic tissue of the penis, making the erection less firm. Exercises. These exercises, sometimes called jelqing, use natural male enhancement 5G Male arm movements to push blood from the base of the penis to the head. Although this technique seems safer than other methods, there is no scientific evidence that it works, and it can cause scarring, pain, and disfigurement. Stretching. Tensioning involves attaching a stretcher or extension, also called a penis traction device, to the penis to gently tension it.