Paedophile effect
It's when someone looks like they just got off a school bus, but they're really an adult trying to be cute. They're hot, but they're also trying to trick you into thinking they're still in school.
My friend's crush is a guy who still wears a hat and acts like he's 14, but he's 28.
My teacher's kid is 21 and still wears a backpack like it's 2010.
My neighbor's daughter is 22 and still wears a headband like she's in middle school.