"How do you tell your friend they have mouth odour?"

Bad breath is something we all have experienced at some point in our lives. We want to get into the personal space of that friend or loved one, but the unpleasant smell acts like a wall keeping us at bay. It is even worsened by the fact that we might not be able to tell them about it without causing them undue embarrassment.

That's not to say its not possible to do it in a polite way which leaves minimal discomfort.