I imagine a conversation between them going like this.
"Quit smoking."
"What? No."
"Poor lungs lead to poor combat ability, I will not abide this."
"Yeah well you're from like, what 1500 or something? You abided showering once a week and like, leeches for medicine and you still turned out okay."
"I died before my 35th year."
"Yeah you and most of the human population at the time."