Smoking and drinking

In my opinion, you can have good time without drinking and smoking because these are secondary things.
Modern teenagers smoking and drinking make them feel older, I saw with my own eyes teenagers that are twelve years old and they smoke and drink.  I don't understand this and I would like to stop it because they really don't know the negative consequences of that.
In conclusion, you can drink and smoke if you want but you have to do it moderately because if you drink or smoke too much, you don't enjoy these moments with your friends. In addition, you can do another plans with them like doing sport, going to the cinema or playing videogames.