Who reads blogs anyway?

Who reads blogs anyway? That is the question. I've been reading some and I'm not sure if the bloggers know I'm reading them, after all I didn't write them a note. I'm not sure is any one reads my blog since no one ever leaves me a message. So perhaps this is just a way for us bloggers to practice our writing or blogging. It's getting late and I'm not really in the mood for blogging so I'll quit because I don't have anything to say.