Let's be honest. Many teen girls merely go to school to text and chat and show off their clothes and flirt with boys and talk about shopping. Kendall Jenner and Kylie Jenner have cut out the middle man of school altogether, and just hang out at the Commons or the mall instead of stupid Algebra.
It may not benefit the Jenner girls in the long run, but in the short run, I suppose it's nice for the boys to have these two roaming out and about. There's a bodyguard out there somewhere who will break the limbs off of anybody who tries anything funny, but I guess leering is still legal for their male suitors. Which is why the Jenner girls like to show some leg. They're growing up Kardashian after all. Enjoy.