I worked on a cancer floor in a hospital and saw first hand the effects of smoking. You can look forward to yellow stained teeth, bad breath, decreased lung capacity ( aka shortness of breath ) cancer of the lungs ( incurable for the most part - life expectancy 2 years ) portable oxygen tanks, chronic cough. Just to name a few.
People who smoke look older than their actual age. ( most of them look like crap after a few years )
I was married to a smoker. He tried several times to quit. Couldn't do it. I ended up with chronic lung problems from second hand smoke. It took four years of being seperated from him to start feeling better. I still have shortness of breath though.
Please don't start. This is an addiction that is nearly impossible to stop.