Pornstars and D&D players generally share a lack of parental involvement in their formative years, but one wouldn't imagine that the two would overlap. (heh. Lap.) Dungeons & Dragons is a great common bond for most improvisers and actually a fantastic learning tool for improvisational dialogue and problem solving. If you were take some everyday Dungeons & Dragons players and then ask them to star in some adult films I don't think the result would be very entertaining. On the other hand...

what if you took some pornstars and had them play Dungeons & Dragons? And then you recorded it and posted it on the internet? The Escapist has done just that and the video stars Kimberly Kane, Zak Sabbath and has a special appearance by pornstar turned mainstream actress, Sasha Grey. Here's the video.