I’ve struggled with this one for a long time - how do you tell someone, in a way which is supposed to be helpful and constructive, that their breath stinks? Do you buy them some floss and a tongue scraper and leave a note? Do you say to them “Look, you know I’m your friend and just want the best for you don’t you?” and then hit them with it? Do you leave an anonymous note setting out the problem and asking them to get help? What do you do?
Considering the number of people I run across who seem to have completely avoidable bad breath I think this knowledge would be useful.