I Wonder If LKH Has Seen These...
(Somewhat NSFW; may at least want to turn your volume down before you can find the audio controls embedded in each page.)

I'll bet you've been saying to yourself, "Self, I have often wondered, is it possible that jewelry exists that will enhance my sex life? Is it in fact possible that jewelry exists which is possessed by incubi who will pleasure me when I wear it, particularly in my sleep? And is it furthermore possible that such jewelry is available from an eBay vendor who appears to be afflicted with a particularly virulent strain of pagan fluffybunnyitis crossed with a taste for shameless hucksterism?"

Wonder no more.

I'd post highlights, but I can't wipe the blood out of my eyes fast enough. Although I will say that the "magical effects" of that second ring sound EXACTLY like the ardeur as described by Laurell K. Hamilton in the Anita Blake series, minus making everyone else lose it too.