Smell Is a Chemical, Physical Reaction

Smell is a chemical, physical reaction. So if you smell something, you are breathing it in. That is a good indication if you are close enough to someone that you could smell their perfume. Or you are probably close enough that you are also breathing in the cove that they're shedding. A lot of that covet is embedded in little droplets. But those droplets can be very, very teeny. Is small enough that you will breathe them in with that waft of perfume.