I'm not sure that I could get the Mrs. to use this thing, but its called The Cone (there is even a video advertisement for it at the bottom of the linked page) and its a sex toy. You sit on it, or lean on it, or whatever and it vibrates in 1 of 16 speeds. Plus, it has an instant orgasm button.

The image below shows some recommended positions. The one on the top right is labeled 'The Lunge''. For about $50, this thing seems well worth the money. Plus, its abstract enough looking that you could leave it out on the coffee table during parties to confuse the guests. [via Gizmodo]