Common sense

"I would never marry you." 

"That's very convenient for you because I don't recall asking you to." 

Emma fumed. "I wouldn't marry you if you were the last man on earth!" She paused for a second as she pondered what was clearly an overused cliché. 

"Well, maybe if you were the last man on earth but only then!" 

Alex decided he loved her obvious common sense. 

Julia Quinn, Splendid