I don't know why. I once asked a passenger in the rear not to block the rear view mirror. [I had intentionally placed him in the rear seat behind me so that he would not block my vision. My wife was "riding shotgun."] He replied with some psychobabble about relating to the person one is talking to, and didn't move his ****ing head. I have no idea exactly what he said, and care slightly less. This was twenty-some years ago, and he hasn't been in a car of mine since. Of course, I don't see him much, anyway.The OP mentioned talking to a passenger as one reason for distracted driving causing an accident. Why do drivers have to turn their heads to face the passenger when they are talking? Yesterday on a two lane highway, the car ahead of me kept going over the centerline everytime the driver turned his head to talk to the passenger. Several times the car was in the middle of the oncoming lane before the driver corrected.
Why?
I occasionally worry about whether stupidity is contagious.