I've lost one of my very best friends to smoking (Well, really drugs in general, and his OD was Crack). I really don't condone it and strongly suggest kicking it. It's not worth shortening your life for, really. Plus, as the others have said, bad breath. Sorry, but I hate the smell of a smoker, much less having to smell their breath. Plus, it'll eventually come back an bite you in the butt. Best to quit earlier than later. Your withdrawal gets worse and worse over time. My friend's addiction to smoking had gotten to the point where if he didn't smoke enough in a day, he shook to violently to even start his car. I've also seen the effects of it on my Grandfather (who's smoked since he was 12) and my Grandmother (who doesn't smoke). It's not a fate I wish on anyone, not even the people I hate most. So I strongly discourage you continuing, obviously. Also, side note, you'd be amazed at how much extra money you'll have just by kicking your smoking habit.