I'd say "I love your coat!" but wouldn't ask where they got it from.
If we were close, I might say "wow-wee, your breath's a bit pungent" but I wouldn't offer them a mint.
If they could talk to me, they might say "Love your glasses, can I sniff them?" but they wouldn't wait for me to answer.
It's times like these you need a camera because no one would ever believe such a conversation took place.