They have been used since ancient times under the name of "cinderella" and are intended for the enjoyment of both leaves. The first vibrators were made of wood. Nowadays erotic factories are doing a great deal of research on their materials, the durability of their mechanisms and the shape they need to have. Lately vibrators are made from high quality materials such as hypoallergenic pharmaceutical silicone glass etc. which can be rechargeable. This erotic game is ideal for self-satisfying men or women and offers intense and multiple orgasms. Many of these games are recommended by gynecologists and obstetricians to train the muscles of the vagina and pelvic floor and psychiatrists to combat various psychological problems and urologists for various erectile dysfunctions.