Yes I smoke cigarettes. I enjoy tobacco.
I am 50, and I have quit twice. I went for over a year and started again because I like tobacco.
I prefer good cigars, but they are too expensive, so I only get one as a treat now and again.
To the health question, I have worked all my life around "dangerous" chemicals. I am saturated with stuff you don't want to be near. I grew up on DDT and Dioxin. I am 50 and in good health.
My younger brother died at 10, from a heart attack. He did not smoke.
I knew a man in Key West that died of lung and throat cancer, he had never smoked or used tobacco. Shit Happens folks.
Nobody lives forever. Everybody dies.
Enjoy your life.