I think young teenagers feel like they need something to be "special" and fit in, nowadays what is fashionable is a disability, a different gender, live hair color...

They see someone with "something" getting attention, so they will imitate, because they want to be someone

It is like before people felt they needed to belong to a group, goths, populars, punks, hipsters, sport, emos, nerds... Which still exists but that is now to "normative", they want to belong but be different, so they offshoot to the Gothic with pink hair

Which was always a big blunder made by most teenagers minding to much with appearances, wanting to fit in and fearing being called losers. Focusing too much on the external and ignoring what really matters, their aspirations of what they want from life

It seems that now a days we focus on physical differences more than ever, even though we keep fighting for equality. Maybe we forgot to tell that to teenagers. Or maybe it is the hard focus on how can we integrate the ones that are different, minorities, disabilities... Leaving out how to integrate the rest