Why do people smoke? People smoke for various reasons...among them are curiosity, peer pressure or wanting to fit in, stress. What can smoking do you? It can ruin a persons health and appearance. Smokers risk cancer, heart attacks and other diseases. Why are smoking and vaping wrong? Apart from health complications, they've both been implicated by death in users, and they are both addictive. How can you say no to smoking or even break the habit? First and foremost is asking for help, probably from someone who has been able to quit smoking successfully, secondly, avoiding people or places that feed the urge.