While several studies have shown there is a statistical increase in diseases similar to those attributed to smoking, not a single one has 2nd hand smoke causing a higher incidence of cancer, heart disease or any other disease/health concern commonly associated with smoking. That being said, smoking is a dirty nasty habit I gave up completely nearly 20 years ago. If folks only knew how nasty they and everything around them smells to others... Lastly, quitting isn't simply a matter of willpower. People have different ways their body/brain react to addictive subtances. There are those that quitting is no big deal and others who will smoke through a stoma in their neck until they die. Just my .02.