Interestingly enough, Marie is a first-year medical student. She basically gave him what sounded like a high school health class lecture on why smoking is bad, then said "I'm not going to say anything else about it" but a minute later they were arguing about smoking again.
Him: "If smoking is so bad, why don't they have more medication for it?"
Her: "But you're spending so much money on cigarettes"
Then they proceeded to calculate the total cost of cigarettes...in Euros.