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

Context: It became apparent that nobody really pays attention to that part of cigarette ads ... everyone smokes . We came home reeking of cigarette smoke and I had to put my clothes in a separate bag in my suitcase ! I swear , even the sandals I was wearing still smell like smoke .

Answer:

Since everyone smoked , all the items in the suitcase reeked of smoke , including their sandals .



Why did they put their clothes into a separate bag ?