A designer on the website Pixeloo made a rendering of what Mario might look like as a human. It was "created with Photoshop CS2 and a bunch of random faces pasted over a 3d render of Mario from Nintendo." Wow, scary. Trust me, I know what you're thinking -- and I can't believe I spent so many hours of my childhood playing with that pederast either.
The real face of the Mario [notcot]
Thanks to phuzzygish, who is both phuzzy and gishy, for the tip