then it probably means she hasn't experience or been exposed to 'e'.. which doesn't make her immature or young, just maybe she hasn't associated with people who are involved in that kind or recreational activity?
because someone doesn't hang around people like that, does not make them narrow minded or life ignorant... thats like saying someone who doesn't practice or know about meditation is ignorant!
probably that she is narrow minded as in she doesn't have much knowledge or life experience and so... or that she doesn't think out side the box .. it can mean plenty of things ...so..
I guess that it is a hint to the drüg called ecstasy, usually abbreviated e. Many people who go to clubs will know the abbreviation.
wish i could dislike somethings sometimes..