Poe leans into John's space to sneak one of those pork rind things that seem particularly popular in this place. He can't decide if he likes them or not. Hence... the reason he keeps eating them. Because that will help him figure it out, no?

No. It's really not helping him figure it out. It's just making his fingers greasy.

Which is why he wipes them on John's jacket sleeve as he leans in to kiss the other man on the cheek.