Extreme Board is designed as a fucking machine for sitting positions.
The board has a soft pillow and drive with levers mechanism.
Person is sitting on a pillow. Levers mechanism provides stroking motions of dildo. Dildo position is adjusted on an
optimal height over the pillow for sitting position, and may be sub-adjusted up-down for personal features.
The stroke may be adjusted by moving the crankshaft joint on the lever from 3" - 5" (7 to 12 cm).
Frequency is regulated by remote control.
Machine is very convenient for long term sexual acts. It may be installed on a bed or sofa with back pillows, providing comfortable body position.
Sit&Fuck
Principle of action
(In this demonstration clip, dildo is fixed to the lever.
But in "real life" dildo is swinging free on its axle, and moves horizontally.)
