because I don't have a twitter yet.
In 2003, I felt the same way because I didn't have a Linkedin account.
In 2004, I felt the same way because I didn't have a blog.
In 2006, I felt the same way because I didn't have a myspace.
In 2007, I felt the same way because I didn't have a Facebook account.
This time, maybe I really don't NEED a twitter. I am already struggling to update my blog once a month anyway.