My younger brother died of lung cancer age 33. He smoked dope every day. My dad smoked cigars during the war, but quit thereafter. It extended his life by many many years according to his heart surgeon.
I love the smell of weed, cigars, pipes. Not cigs, they really smell bad. I do not smoke any of the aforementioned as it seems narcissistic to me. Besides, I have enough work keeping up with the youngin's without having crapped out lungs!