Cigarette smoking among college students
The majority of lifelong smokers begin smoking habits before the age of 24, which makes the college years a critical time for tobacco companies to convince college students to pick up the habit of cigarette smoking. Cigarette smoking in college is seen as a social activity by those who partake in it, and more than half of the students that are users do not consider themselves smokers.
Source: Wikipedia — Cigarette smoking among college students (CC BY-SA 4.0)