With smoking becoming more popular among teenagers while i was growing up, it became the thing everyone was doing. You would watch as the popular kids went to the furthest part of the school field and you would see a cloud of smoke hanging over their heads. with them convincing themselves as being cool and grownup and thinking they had "set the standard" when really all they were doing was following a pettern.

http://www.statistics.gov.uk/STATBASE/expodata/spreadsheets/d7774.csu