When I was 12 I thought I was old enough to smoke and drink.
Why would you think it's okay to smoke and drink at such a young age?
I thought I was mature enough and I wanted to look cool
At twelve years of age, you are not old enough to make adult decisions. Smoking and drinking is bad for anyone's health but it is especially bad for a very young person.
Wtf why are you talking to me like this. I'm a grown ass man now.
Okay, you're a grown man now and can make your own decisions, that's fine. But at 12, you were still a kid and even if you felt mature you were still too young to make those decisions.