Ha ha ha .. this is very original, I love the idea and great execution. my suggestion is, it will look better if you can make his neck in B&W too.

Really wonderful work, great concept, great contrast...excellent idea. Nice job!

I'm not a fan of selective saturation, but this one is an exception.
Great idea and well executed.

very very interesting take on the topic. very original, my compliments, I agree with the comment about the neck. It should be desaturated too.

Thank you folks for the comments. I agree, I think I will desaturate the neck, I think it would better the image. Thanks for the suggestions.

This is just wonderful! The other place I'd suggest desaturating - to cement the illusion - is the tongue and gums. It just seems like you wouldn't run the brush over part of the tough. Great execution and what a cute little model too.

I love this picture. at first glance I actually thought you were painting his face grey like in that move Pleasantville. I love it.

Now that is a good one. Creative idea. Well done.

Great idea & good use of the cut-out !
But, I'm not sure that the rendering on lips and teeth is very good...

Excellent idea! Well done!

Great idea! Nice Job!

Awesome Picture! This is a fun photo, I love it.

That looks so cool, what a great idea!