Chase “Gnaws” My Knuckles

This is something that Chase only does when he’s hungry, and sometimes he’s very insistent about it. I suspect it’s similar to wool sucking behavior, because sometimes he kneads while doing this, too. He’s not actually gnawing, per se, and it doesn’t hurt. He presses the corner of his mouth against my knuckles and…it’s more like gnashing his teeth, I suppose. Has anybody ever seen anything like this before? Do your cats ever do this?