The difference between a girl, 15-16 and one 17-18

Mary Claude Mayer of Publicis Groupe says that French girls go quickly from dressing "like a boy" to discovering their femininity at about 14 or 15. Today, there's an explosion of sales of expensive lingerie to young girls, even ones who don't have boyfriends.

At 15-16 they're still behaving in ways intended to please others, or intended to reject others' styles and rules. At 17-18 the girls figure out who they are and begin to dress, think and act for themselves.