Their brains are different

I shouldn't have said that teenagers are stupid, it's more that their brains are still developing. In calm situations a teenager can make just as sound (and yes, sometimes better) decisions then adults. But when they are put into stressful situations their brains get hijacked. Their frontal lobes are not fully developed and constantly changing which is the reason there decision making is brought in to question. The frontal lobes are also the part of the brain that puts the brakes on risky behavior and controls decision making and they're also one of the last parts of the brain to become fully developed.

Teenagers are four times as likely as older drivers to be involved in a crash and three times as likely to die in one, according to the Insurance Institute for Highway Safety. It's because they can't see how their actions might affect their future, even in life-threatening matters.

And yes, being an adult doesn't suddenly bring all the answers and stop adults from acting in immature, and frankly stupid ways. But don't you remember ever looking up to an adult when you were a kid or teenager that you look at now and go, that guys kind of an idiot... Teenagers are influenced by those around them, adults, other teenagers, the media.

I'm not saying teenagers are mindless being who don't know anything until they're adults. Sometimes they have much more insite and self-awareness. They are more able to change and create new and unique ideas. Their brains aren't fully developed, and so they make decisions based on how thier brians are taking everything in.