Phat Ass on LetMeJizz
Doggy and reverse cowgirl carry most of these scenes because both keep the rear filling the frame, every thrust sending a slow ripple up across the cheeks. Camera work sits low and close, tracking the bounce instead of the faces. The appeal lives entirely in scale, the wider and heavier the better.
110 phat ass 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.