The most obvious reason as to why teenagers start smoking is peer pressure. Their friends are smoking so they feel the need to start smoking in order to fit in. Many parents may underestimate the power of peer pressure. They believe that their child might be able to resist the pressure their friends put them through. However, a lot of teenagers succumb to peer pressure as they want to feel as though they belong in a particular group. They want to feel accepted by their friends and so, they start smoking as a method to be accepted by their friends.