[khazhoux]

Look in the mirror, and if the back of your tongue is white or white-ish at all, your breath stinks. That white stuff is bacteria.

Did not realize this until my 20s. Most people don't tell you when your breath smells bad.

[nonethewiser]

But does your breath stink? There will always be bacteria in your mouth. Doesnt mean it will always stink.

[khazhoux]

Well you can easily try it. Scrape a chunk of the white off the back of your tongue, and smush it between tour fingers. Does it stink?