Coffee Breath: whether or not someone brushes their teeth before or after coffee, it is still a distinct flavor of a smell that leads the palate numb for days!
Next to being a natural protection against curious children who otherwise would be pre exposed to potential harmfull ways in the intriguing "worlds" of the adults it can be a huge distraction in conversation or other engaging activities if the other person is more sensitive or feelsy about coffee. Fair enough to say, people should brush their teeth, whether they drink coffee or not.
"Do i have coffee breath? I can't tell i haven't used my palate in years!"
joe locke has coffee breath according to both kit and bash (bash took it to the extinct and made a whole song about it . that had the whole fandom, screaming and crying