Keep your nipples stiff and sensitive with this nipple erector set and enjoy pumping pleasure! To begin, take the pump with the smallest opening. Slide the rubber ring of your choice over the opening and position it on your nipple. Squeeze the air reservoir until you achieve the desired effect. Slide the rubber ring around your nipple to maintain its hardness and sensitivity. Repeat these steps for your other nipple. For even larger results, use the pump with the wider opening. Have fun!