That's it, really.
I have severe anxiety about my breath. Brush thoroughly at least twice a day (more if going out or having a meeting), brush tongue, use Listerine, etc. I've been using an interdental brush, but apparently not well enough. I decided to use floss for a change, and to my immense embarrassment and worry, the floss did not smell great afterwards. Especially with certain teeth which are close together. There was not all that much plaque, but it had that distinctive and horrible smell.
Does this happen? Is it just me? Am I frightening the population with my wallpaper-curling breath after all? I may lack proportion...