30 years of smoking, 35 since I quit.......math is just a concept.....still only 39 yrs old.....When I smoked I never knew it irritated nonsmokers. I was often told, "you should stop smoking" but I thought I'm different, it won't affect me......I have had multiple cancer surgeries and now someone smoking takes my breath away.....Smoking around nonsmokers is just plain ignorant. Also, I was a very competitive amateur athlete until I was in my mid-fifties...Multiple back surgeries finally ended my athletic ego trip....In my sixties, I had to start paying the fiddler...The reason to mention the athletics is to show it did not affect my breathing significantly until I was almost 60 yrs. old