A stranger's ass fills the frame, cheeks clenching as a thick cock disappears inside. The rider, unseen, grips the hips, pulling the ass down, impaling it on their shaft. They set a steady rhythm, filling the room with the sound of their hips meeting the ass, the slap of skin on skin. The rider's breath hitches, their grip tightens, and with a final thrust, they bury themselves deep, holding the ass tight as they come, filling the unknown hole with their hot seed.