Aesthetics is a set of principles concerned with the nature and appreciation of beauty. So why are teenagers obsessed with this specific branch of philosophy? Its never easy to understand the mind of a teenager, but upon looking at the aesthetic inspired fashion you can sense why they are obsessed with this concept. The overall aesthetic look is very retro and very vintage; way before any of these teens were born.

Baggy jeans: this style of jeans are very in with the kids they are baggy, but still manage to look somewhat cool.
https://www.yesstyle.com/en/tcuc.GBP/coc.GB/info.html/pid.1090459489

A good old Graphic tee is very much a favourite amongst teenagers, again very much out of this century
https://www.dalaline.com/products/vintage-monogrammed-t-shirts?variant=32384161284142

As you can see the mind of a teenager vary but their style is top-notch