The short answer is: I don't know.
The long answer probably has something to do with human psychology. Or, as in the title of my long-ago college textbook, Abnormal Psychology. I don't really care. What I can say about Twitter after three days of tweeting is that it's addictive.
I don't think I have an addictive personality. I don't drink or smoke or gamble. I have had a chocolate problem in the past (there was this one horrible night. I left my psychotherapy practice around 10pm and thought "Where can I get chocolate at this hour?" and I realized that even if I had to drive to the scary neighborhood where you could get drugs for exorbitant amounts of money and empty my wallet for an ounce of milk chocolate, I would do it. That was my wake-up call). And I do have a little problem with coffee. Oh, and SuDoKu. But aside from those few harmless habits, I really am not the addict type.
I frankly don't understand Twitter, either. I haven't figured out its purpose, at least not for the rest of the world. I have, however, figured out its purpose for me. It's a place to put my itty bitty thoughts. You know, those thoughts that pop into your head and that you want to say out loud to someone but there's no one there. Thoughts like "Someone should clip the toenails on those poor canaries in the picture above." Well, that's not a good example, but you understand what I mean. Of course, most of those thoughts are totally insignificant and unworthy of being put in writing, but I don't care about that either.
I guess I'm tweeting just because I want to. Are you tweeting, too?
http://dianechamberlain.com/blog/2009...