So, why do they do stupid things, you ask? Here is the reason:
"...the desire for acceptance among peers wins out in the decision-making process of a young mind. Teens often decide that the benefits of risky behavior immediate gratification or peer acceptance."
Teens also take 170 milliseconds longer to ponder situations than adults. That's it, 170 milliseconds? My computer has more lag than that when I am surfing the internet.
Good job, jackasses. You just confirmed what parents of teenagers have known for the last 300 years or so. If you would like to read some more revleations in teen behavior like these subjects- Why Teens are Lousy at Chores, Human Nature: What We Learned in 2006, A Brief History of Human Sex and Why Teens Don't Care- then visit the link above. Those psychologists are all over it.