Lady, if you're going to ask "Do you mind if I smoke?" and I reply "Yes, actually; I have asthma":
-go on about "ooh EVERYONE says that nowadays, it's like an EPIDEMIC". Yes, I stayed up all night with my brothers and sisters on the Asthma Bat-Phone cooking up the SEEKRIT Asthma Conspiracy: "You, meb21! Make sure none of the people in your patients' homes can smoke! It will drive them MAD and we will finally rule the WORLD!"
-say stuff like "Did you hear they're taking that stuff off the market" and make some vague inhaler-type motion with your hand. What is ThatStuff? Should I ask my doctor if ThatStuff(tm) is right for me? Perhaps if you quit the pack a day of that nicotine stuff you're smoking you'd be better off. But I'm a bad nurse, of course, judging you.
-fondle your lighter and pout for the rest of the visit. You're not even my bloody patient! I'm here to see your aunt! Can you hold off of a smoke for 45 minutes while I assess her?? Or go out on the porch!