Fingering on LetMeJizz
One hand sets the rhythm and the receiver just has to take it, which is where the charge lives. Fingers slide in slow or work fast and rough, the giver watching every flinch and reading when to push harder. Control sits entirely on one side, and fingering trades on that lopsided power, a partner brought to the edge by nothing but a hand.
3.5K fingering 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.