As a rule I don't sit for other photographers. But once in a blue moon - if I like the project and respect the artist - I will.
Some time ago Chan Chao asked me if I'd participate in his Echo series. (link nsfw) And being that he met my two criteria I said "Sure!"
Jump forward to yesterday when I met up with him to sit for his latest project - and he gave me a print from the Echo series.
I love it.
Me, close up, every pore visible with absolutely no make up... and I love it.
This doesn't do it justice but you get the basic idea. NSFW