I use a specially designed electrical device for masturbation - it has a programmable electrical pulse, a metal probe that is inserted down the urethra and a metal ball that is inserted in the anus.
With this device the muscles are stimulated into contraction and release at whatever rate you dial up on the device. The orgasms and ejaculations it produces are fantastic, my wife sometimes uses it and says that it is incredible to feel her insides clenching and unclenching with the stimulus.
