Teenagers are idiots in many ways, but also hunger for real, deep ideas. Maybe if they weren't so consistently underestimated they would take things more seriously.
I apologize, ofcourse they have a hunger for real, meaningful and deep ideas but, they are still pretty dumb. Not dumb as in lacking intellectual ability but dumb as in willingly stupid. Thats the key. No shade but pop culture is basically a "teen spirit" transformed into profit by BS Inc.
And ofcourse the small issue of sex being 80% of what's on their mind. Perfectly natural and healthy.