A (pervert) gadget ring

I just thought of a ring that can be custom-made to contract and tighten in your finger in the same rhythm, timing and intensity as your lover's vagina muscles do. Assuming it's possible to store in memory and replicate vaginal undulations and create the ring, what do you think of it? Is it too pervert a gadget? Will it sell only as a prank-ring? Can it enhance sex drives if worn regularly? In a prank store it can sell under the name 'The Lord of the Rings'. In Tiffanny's it can take a more descriptive name, e.g. 'Tightania' with the word tight alluding to how the mechanism of the ring works :)

http://www.thinkaloo.com