Optical Illusion Tattoos

I like the illusions in and of themselves. They aren't creative tattoos per se, the one of the right is MC Escher. It is not so much an optical illusion as it is a statement of truth.

"My work is a game, a very serious game."
M. C. Escher

"It's pleasing to realize that quite a few people enjoy this sort of playfulness and that they are not afraid to look at the relative nature of rock-hard reality."
M.C. Escher