Brushing your teeth at work:

Please do not brush your teeth in a public restroom at work. 

This drives me absolutely crazy. 

Some guys park themselves in front of the mirror for 5 minutes to give an oral exam - with flossing nonetheless!

There are literally molecules of poop and piss floating around in the air in that restroom that are landing on your toothbrush.

Trust me, the ventilation is always awful in all public restrooms.

So please enjoy that thought in your supposedly minty-fresh mouth.