I changed my mind about smoking twice. I grew up knowing that it was a stupid thing to do that stupid people did. That it was disgusting and would kill you. And then I got to 17 and found that it made me look and feel pretty cool, it made me look a bit older than I was so I got my ID checked less and it really reduced the stress levels I was suffering with. And then I got to 30 and realised that I wheeze when I walked up stairs and coughed crap out of my lungs every single morning. I was paying money to do something that was killing me and that made my eyes dry and itchy and made my mouth taste like asses. I've been a non smoker for 4 months and it's excellent.