It's a psychological game of chess - Hinata is that master with cunning traps while Sou is that clueless newb who somehow found all the Stockfish moves.
So they're close enough for her to play with his hair.
And yes, the age old question: is it safe for catgirl to eat chocolate because she's a girl? Or is it not safe because she's a cat?
There's so much going on over a booger. I like how Anya casually read someone's flashbacks. It snuffed out comebacks had she not cracked her foreshadowed neck.
It kind of reminds me of High School Musical, where everyone must only have the same interest as their circle of "friends". It's stupid but kids do label their friends and themselves into certain archetypes, and deviating from it is a taboo.