Man this guy is hella perceptive.
There really aren't very many people out there who can tune into someone's emotions like that, let alone care this much.
It isn't just that he's sensitive to scents, but that he bothered to track and remember what scent was tied to which emotion. He's reading her.
@sem I was literally just having the same thought. At first he will a little creepy. But to be able to be so in tune in your senses that you're able to tell someone's emotions that's pretty cool.