Kayleigh Sparks aka Umeko, of Edinburgh, Scotland, drew these three skulls. She explained they are "a set of see (Mizaru), speak (Iwazaru) and hear (Kikazaru) no evil skulls." If you are familiar with the tale "Three Wise Monkeys", then you know where See, Speak, and Hear no evil comes from. I recall reading the tale when I was a child, and have always enjoyed seeing artwork inspired by it. There are various interpretations of the story's meaning. I like Kayleigh's variation with the censorship bars. There are certain "evils" in our culture we are commonly encouraged not to see, speak, or hear about, and these remind me of those.