as a smoker, I can tell you. This kid was taught to smoke. Smoking is tricky, its not something you just pick up, you have to practice. smoking is one thing, smoking and inhaling is another. you can mimick smoking as a kid (candy ciggys anyone?) but it takes time to learn to inhale the proper amount, without causing your lungs to seize.
aka, if you inhale too much, or too deeply it hurts. (as any smoker with hicups can tell you). If this kid smokes, he has been taught, and he has had alot of practice with it. A two year would take one hit off a cigg, gag, cry, and never do it again. That is of course assuming he had figured out how to light one (or that he needed to in the first place). For a two year old, (or any child) to learn to smoke, they have to know how to hold the cigg, how to light it, how to inhale, how much to inhale and how long to hold it before exhailing. IMHO this would be impossible without someone teaching him. If this is a cultural thing (yes people let their kids smoke, and doctors way back when used to encourage it for health reasons) I would try to be understanding, but since the child is also obese, I can only assume its because of parental abuse/neglect. Sick.