Perhaps even a water cooler. These folks like to conduct business while driving around, which saves them a lot of time. They can weave through traffic, chat with a client and type notes on the computer, all at the same time. This wouldn't be a problem if they had three pairs of hands, two sets of eyes and one or two extra brains. But for that, we'd need a nuclear accident.
Most people have only two hands.
We also have only two eyes and unfortunately, both eyes are on the same side of our heads. That's why we need rear view mirrors. That's why we're so concerned about back-stabbers. As for brains, we're pretty lucky if we have one good one. Just ask the guests on Jerry Springer.