Smoking is fun (for smokers), it relieves a lot of stress, is a way to waste time, and to some people smoking eventually becomes a friend.
A friend is someone you care about, someone you wouldn't want to harm in any way, and is someone you trust with your valuables.
How would you feel if a friend of yours borrowed your car and smashed it, slammed it, broke it, and turned it into a mess, Willingly?!
How would you feel if he did it right infront of you?! as you watched him?!.... would you be angry? what would you do to that friend of yours?
God has trusted you with this body, it's not yours! it's his!