How is his sense of smell?
I have very little sense of smell, and I've had it checked, affirmative, it's low. Was fine in a film crew in a stockyards, while others were cracking jokes to keep going; had a class I was in flee because of a sulfurous chemical, 2 mercapto ethanol, and followed them out like a lemming, smelling nothing.
On the other hand, I ask close friends to tell me. Apparently garlicwonderwoman doesn't blast it into the air.
Anyway, this is odd stuff happening with him, and also happening for you.
Was he always this way since you met him? I agree with everyone so far, he needs to see a doctor. How you get that to happen, I dunno.