I was seventeen and was a few months into my senior in high school. I was at a private school after having gone to a public school the previous year. One day when i was pulling in my driveway after school, one of my friends from the previous year at the public school was walking down the street in front of my house. We started hanging out and i eventually found out that he and some of my other old friends smoked.
Around that time i was in a "Fuck it" mood and was drinking and partying alot, just having fun, after having lead a relatively clean lifestyle. Then one night my friends parents were out of town and i went over to stay the night. Then some of his friends came over and asked if they could smoke there. After thinking about it a bit i was like "Shit, ill just go for it." and asked if i could get in on the circle.
Been open minded about it since.