If it takes a family history to decide whether smoking causes cancer, does it take a family history to prove whether smugness and self-righteous are inheritable?
I encourage all smokers to keep smoking and in fact I want them to double their intake. If it doesn’t cause cancer, then it shouldn’t matter and I want to make sure they are enjoying their smoking to the fullest extent. Inhale deeply! Light up! Enjoy yourselves!
It might help you if there were.