Double anal penetration

Description: A rarity even within specialist production: two partners penetrate the anus simultaneously, the receiver riding one supine partner while the other works from behind. Where most three-person stacks divide contact between orifices, here everything concentrates on a single anal entry, and sustained relaxation plus precise pacing between the two penetrating partners becomes the entire discipline.

Variations: Both penetrating partners can lie stacked beneath the receiver, or the arrangement runs as ride-and-kneel with the second partner upright behind her, matching the receiver's forward lean.

On camera: Tight low-angle framing documents the double entry, and the act appears almost exclusively in gonzo specialist material, where it serves as an extreme-category marker.

AI design considerations: The silhouette is indistinguishable from other riding-plus-rear stacks; the penetration target defines the pose, so accompanying tag data must carry what geometry cannot show, and depictions should keep the rear alignment unambiguous.