For constant, ultra discreet stimulation anywhere and anytime, give the classic Ben Wa Balls a try. These weighted balls are meant to be inserted into the vagina, where they move when you do for constant, teasing stimulation. This style of toy is truly ancient, with a variety of uses throughout history. Today, their main benefit, a side from pleasure, is the strengthening effect the balls can have on the pelvic muscles, since flexing and un-flexing these muscles causes stimulation. Your set of Balls could be worn all day, or for a hour or so before sex to get you all revved up. Balls are 3 1/4 inches around and weigh about 5 oz (.31lbs) combined.