My favorite is when you smell something so horrible that it seems to get stuck in your nose and you smell it for hours even after leaving the smelly place. 🤢
This is why you can taste/smell saline when it’s injected. Trace amounts of dissolved things (which taste like plastic and metal) in the saline are able to pass through the alveoli in the lungs and evaporate into your breath.
Oddly, I think it’s a similar thing with my ADHD meds because about an hour or two after taking them my breath smells/tastes weird.