Face Sitting on LetMeJizz
She lowers her cunt or ass onto his mouth and settles her full weight, leaving him to lick from underneath. The power sits entirely with whoever's on top, grinding and smothering while the one below works just to breathe. Most scenes play up that dominance, thighs clamped around his head until she gets off on his face.
407 face sitting videos here, all HD and all free. New ones go up daily, so check back if you don't find your scene first time around.