Rabbit vibrators can differ widely in terms of quality, size, and function. What makes most rabbit vibrators unique, and it’s one of the things people love about them, are the rotating beads in the shaft of the toy. Not all rabbit vibrators are created equal. In fact, rabbit vibrators are just a descriptive term for a sub-category of dual action vibrators, which are designed for simultaneous vaginal penetration and clitoral stimulation. Rabbit vibrators have become extremely popular in no small part because of the feature role the Rabbit Pearl captured in an episode of "Sex in the City." But there is a world of difference between a genuine Japanese rabbit vibrator and a cheap knock off.