Ass Fingering on LetMeJizz
No cock goes anywhere near the hole in these, which is the line that keeps it apart from full anal. A finger or two works the rim and pushes in, sometimes as a warm-up and sometimes as the whole point, with the slow stretch doing all the work. The camera stays close on the knuckles disappearing and the reaction it pulls.
129 ass 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.