For the life of me I can’t understand why anyone would consider face metal attractive.
What if you’re a female trying to beguile a scrap metal yard owner as your future husband? :)
Young’ns are brought up in a peer group bubble culture. Very little interaction with older, usually wiser, folks. So they develop their own sense of “beauty”. Fits in perfectly with the “perception is reality” philosophy.
Basically children trying to impress their peers in the sandbox.