I've never seen a still photo of him naked online. That's not to say they don't exist, but I've been looking at porn on the internet for close to twenty years and have a good visual memory (yet terrible at names); however, I don't ever recall seeing him in the full monty.
Videos are an entirely different matter. It's not hard to find lengthy cam footage of Michael working out in the nude and jacking off. Hours and hours worth out there. He can't keep his hands off his cock.
This I do not understand. It's somehow untoward to have a tasteful, artistic nude shot of yourself made? Yet it's perfectly okay to jack off like crazy for hours on end in filmed footage that will exist until the end of recorded time?