The person who smokes may find it exciting, fun, and the person may believe that there aren't some disadvantages of smoking.
There are many consequenses, for an example bad skin, lack of condition and in a long time you can get cancer and die.
Pregnant women who smoke hurt their children and the child can get injuries such as developmental disabilities and premature birth.
Each year 450 000 people die of smoking
That's alot of people who just die of smoking
Maybe that's why you are not allowed to smoke or use any kind of tobaco if you are under 18