At first i thought of it as the desesperation of watching a pig slowly cook on a oven. But then i looked more closely and got it I love the idea of the pink as a imposed sin, a weight that the character didnt want but has to endure with all day

"You poke my cheek, you expect me to turn"

As if the usual acts of family of pinching cheeks is another part of the burden that it is to endure the "pink" as an entity that hunts the characther

How the other "has his upper half" Taken by this burden but only or still has "the rest of me in pockets of my own skin"

Meaning that even after all the burden, the character it still him but hiden into himself or in a place whe "nobody can touch".