I think it's the same theory with the ideas too. When a blog started and after we started blogging, It becomes our passion and we live on it for sometime. Since it makes us a little domain of ours to work with and because we get the appreciation we seek, Blogging make us available... for the rest of the world to see. And it's a kind of a place which we can pretend as the person we really want to be.
In my case, I was just using my yahoo mail account to forward mails and internet was nothing more to me. I've been doing that for almost 5-6 years until one day around April 2008, I got the membership of a local community site. It was a turning point of my life and that decision changed my life forever. Within few months I became a blogger and was enjoying it very much. As I mentioned earlier, it was the way I made myself cleared. The way I spared my thoughts and stuff.
After I met a girl, She vampired me and all my thoughts were pumping directly in to her. There was no need for me to write a blog since I was not having any thoughts left.
I still have the girl with me and the pumping process is not the same today. So there are some leftovers available.