Would an authentic teen try to pull this off?
no.
1967.jpg
the dutch boy (aka the pageboy or the prince valiant) is a (sadly) common haircut for the older women who try to get a little kicky in their dotage and end up only amplifying their age-induced frump.
see ex 1a (katie holmes, the preternaturally aged momfrump)
Is Marvel insinuating that inside the teen body of Jean Grey lies the eternal heart of a frumpy frau? Is frump just not the complete essence of Jean sans Phoenix?
Is the Phoenix the ultimate essence of life, vitality and vigor and that Jean Grey is as inert and as basic as a North Face vest, suede ankle boots and a Mocha Chai from Starbucks ("Ashley" or "Katie" sharpied on the cup, natch)?