Brushing teeth in public bathrooms is common in Brazil, especially those of an office.
It’s funny. In America you never see it. I brush in the bathroom at work after lunch and everyone looks at me like I’m a mental patient. Like where else am I supposed to brush after lunch? Do people just not brush their teeth after every meal?
That explains why a former coworker of mine, who is from Brazil, brushes his teeth at the bathrooms after lunch at work. I thought he must have had some special reason, but I never asked because I figured it would be too much of a personal question when we weren’t that close.