Well there's a difference between sexy and skanky. Kendall and Kylie dress a little sexy sometimes but most girls their age do. There comes a point where you look skanky, which is what i would call inappropriate. I don't get the big deal with the way these girls dress, really. They never look skanky to me. They usually look really cute. I don't think there's anything wrong with showing a little skin and getting into fashion when you're a teenager.
Wasn't Kylie dressing like this at thirteen? I don't think any thirteen year old is sexy or should be striving to look sexy. They don't have to dress with bows in their hair but they sometimes dress too old. JMO