A dildo is a dildo because it does not vibrate and is usually used for insertion. Dildos come in a variety of shapes, sizes and materials. You may want a flared base dildo to fit into a universal harness. You may want a dildo to help you with vaginal dilation. You may simply enjoy the feeling of fullness that a dildo can provide. Whatever your interest you will be sure to find a dildo that will satisfy your desire.