My dad was a smoker from his teen years to probably his early to mid 30s. My Grampas both smoked. Neither made 75. Dad would put me on his shoulders and carry me around with a cigar sometimes. My brother and I started crushing those cigaretts as young children and dad quit because it got too expensive

Dad suffered from bad teeth with multiple root canals, and severe heart disease that required a quadruple bypass in his early 40s. Smoking contributes to both. He died at 69. I'm almost 50, no serious cavities or heart disease, knock on wood! Never been a smoker, different blood type than my dad even though I do look a lot like him but have way more hair at my age than he did. Hope to take after my mom's, mom's family for lifespan as they lived a LOONNNNGGG time...... 90s and early 100s for many. I think dad's grampa died young too.
Tried chew a friend offered me in junior high. Spit that trash out pretty fast! That guy ended up on drugs and all messed up by 25.
I'm not a fan of tobacco but what you do away from me is your business but it could hurt your family with second hand smoke and losing you early.
For some reason, most criminals around here smoke. Not saying you are a criminal if you smoke but it is one sign someone is leading an unhealthy life.