Ok, now... make it actually linked to the gameplay, like force feedback, those vests you could wear that would 'punch' you when you get hit.
Maybe as a rough, slapdash version, take the output to the game controller vibration insensity, use than as an input to modulate the speed of the uh, 'device', with some kind of 'ramp up/ramp down' time period buffered ramping equation/script.
Hey on that note, is there actually a name for a mechanical dildo on a stick?
I've heard of just 'fucking machine, but that seems a bit... nonspecific? I dunno.