Ballpoint Pen, Shower curtain inspired Raven.
In popular western literature, they symbolize darkness, depression, and death (popularized in Edgar Allan Poe's poem, 'The Raven'). In medieval times they stood for virility. Among native cultures, Raven is the 'trickster' spirit, a popular totem, and the creator of man, who placed the Sun in the sky.
Two very different views, I like to think the latter.