Based on the context and the answer, generate a question. 

Context: She lay down on the couch next to him and fell asleep . * Spike sat on the arm of the couch , his long black coat wrapped around him , smoking . Buffy sat up . " William 's gon na kill you for smoking in his apartment . " Spike shrugged .

Answer:

They do n't like the odor .



Why would William be upset ?