I tried smoking when I was a teenager (~14). I stole some cigarettes from either my Mother or Stepfather (they both used to smoke like chimneys, my Mom later successfully quit, but he's still puffing away), went up to my bedroom, cracked the window, and lit up. Tasted like shit and felt like I was sucking on ashes. So, I finished the first one, thought to myself, "Well, maybe they get better the more you smoke." and tried another. Nope, it still tasted like shit, so, I said fuck that, and never smoked again (except to take one quick joke puff off my older sister's cigarette many years later). After my experiment, I went back downstairs, and, smelling the cigarettes, my Aunt asked me if I had been smoking, and I straight-up lied, "No", and she believed me--I don't know how she could even tell, with how much my parents smoked, the house always reeked of it to begin with--seriously, there used to be a smog cloud of cigarette smoke wafting out of their bedroom. All of my siblings (I have six) ended up as smokers except for me and my youngest sister--although my younger brother kicked the habit, the other four are still puffing.
I've never smoked anything else in my life either (i.e., weed).