These small, innocent-looking things are called love balls or pleasure balls for a reason. The inconspicuous balls are simply inserted to strengthen and tone the pelvic floor muscles through Kegel exercises. This not only improves bladder control and general pelvic health, as well as increasing sexual performance. In addition, as a little bonus, so to speak, the love balls provide erotic pleasure by causing subtle and stimulating sensations when you move them. So you get a training device that is also fun!