Teens actually automatically imitate even more than adults! In fact, inhibition of automated responses is created in the prefrontal cortex area of our brain which is not finished developing until age 25. As a result teens find it harder to resist the impulse to imitate. In addition, imitation is also a matter of social survival. Teens consciously and unconsciously imitate each other to solidify their friendships and feel connection. - See more at: http://www.radicalparenting.com/2011/09/01/why-teens-imitate-their-friends/#.dpuf