Wikipedia
Sybian
A Sybian , or Sybian saddle, is a masturbation device primarily designed for use by women. It consists of a saddle-like seat containing an electric motor, gearbox speed reducer, and mechanism connected to a rod that protrudes from a hole in the top center. Various attachments can be added to the rod, which vibrates, rotates and may also stimulate the clitoris externally. The intensity of the movements produced can be increased or decreased through a control box attached to the Sybian's base.