I’m not sure why, but all my life I’ve seen images of faces in all sorts of things that didn’t really have faces at all. Sometimes they’re in shadows, sometimes they’re in peanut butter, and sometimes they’re in the bubbles on my shower curtain. (Those links go to my kid’s illustration blog, by the way.)
Yesterday I had a vampire in my shower curtain. I suppose you could also see a Rorschach test, but if I had to take my shower curtain as a Rorschach test, I would see a vampire.