After a year and a half of planning, Dee and I photographed the world's largest marital aid in action.
Here's the R-rated, still version (click to enlarge to wallpaper size)
Here's an animation showing Dee getting to know the Penetrode
Here's a (large) animation showing the machine in action. Notice the background billowing from the engine exhaust
Dee said that the probe vibrated powerfully once the engine was running. So you don't even have to pump the probe in and out to make it work.
Our workshop demonstration of "Industrial Strength Marital Aids" is our most popular presentation, but I somehow doubt we'll take the Penetrode on the road the next time we give the talk.