Do you brush your teeth while you're in shower or separately (before or after shower)?
I'm watching IT Crowd and the show is so hilarious. There was one episode where they mentioned about brushing teeth while in bath is unethical. "That's where your... balls are," as she puts it.
I don't know. I did that sometimes too. Especially when I'm in a hurry. Or else, I'll just brush my teeth first thing in the morning when I woke up (in front of the sink and mirror).