Had my first cig at 14, just out of curiosity with my friends and it was kind of fun sneaking about doing something I knew I would get in trouble for. Then I would smoke socially every now and then from about 15-17. Then I started smoking daily at college as everyone would go to the smoking area on every break, so it was either go outside and sit there or go outside and join in with a cig. Then I started going clubbing at 18 too and almost everyone smokes on nights out. So in answer to the OP I started because it was social and at younger ages it was just fun to sneak around and do something bad lol
Now I am at uni and have cut down to about 2-3 a day, simply because it's too expensive as a student
