You just never know. And even if you do know, sometimes you'd just as soon not know. It always reminds me of a scene in the William Brinkley novel, The Fun House. The bemused Life magazine writer sails paper airplanes out of the 34th floor of the Time-Life Building with messages written on them. He seldom, if ever gets answers, but that's his way of touching the world.
Writing is like that.
It is a lonely job. Most writers, including me, find collaboration difficult, if not impossible. Writing is something best done by yourself, usually in silence and usually in a room shut off from the rest of the world. That, I may say, is not true of newspaper writing, but that's another story. Writing also is not a scheduled process.