What is the deal with people who brush their teeth at work?

Today I saw someone brushing their teeth in the office bathroom at nine in the morning. Not to get all Seinfeldian, but what is the deal with brushing your teeth at work? Did you forget to brush your teeth this morning? Did your teeth get so dirty on the trip into work, that suddenly they need a brushing? Where does the toothbrush come from? Is this guy running around, carrying a toothbrush in his pants pocket? For some reason, I don't like the ring of the words "toothbrush" and "pants" in the same sentence. And let's not even talk about the toothpaste. ... Can you imagine this guy, sitting in his office, and suddenly it's all: "Johnson! Bring me the Vandelay file, and a toothbrush! My teeth are grittier than sandpaper!" And what is it about the state of a public bathroom, that makes this guy think "Gee, I could really go for a toothbrushing right now?". The eau du toilet must have just put him in the mood for a fresh minty brusha? The scent of turds and toothpaste wafting on the breeze ... sounds refreshing, no?

I've seen a lot of disgusting things in my lifetime, and that include the time my friend's buddy drank water from the bathroom sink at a gentlemen's club (at a bachelor's party, natch). For some reason, brushing your teeth at work is even more revolting.

So, guys, please, when you go to work, leave the toothbrushes at home.