BRUSHING YOUR TEETH AND DRIVING - HUH?

OK, now I have to admit that I have seen all kinds of things while driving the freeways. I've seen guys shaving, girls putting on eye make up, people reading (What?) and people texting all the time! Now today I must admit that what I saw was a first. Today while driving to work I saw a guy brushing his teeth while driving! What? I stared in disbelief. I mean, who does this? Why would anyone do this in the car and not at home? Are you in such a hurry that you would do this while driving?Where do you rinse out your mouth and spit? I mean, I really just don't get it at all. All I can say is that driving the L.A. freeways is always an adventure.