Double vaginal penetration

Description: Both penetrating partners share one orifice: the receiving partner rides a supine partner while the second aligns from behind into the same vaginal entry. The governing problem is convergence, since two pelvises must meet a single contact point at compatible angles, restricting movement to small negotiated ranges. It is a specialist escalation of the standard three-person stack, performed for the category rather than as a general scene position.

Variations: The two penetrating partners may lie stacked supine beneath the receiver, or the second may kneel behind her forward lean.

On camera: Framing goes low and close on the double contact; the shot documents the act itself, and its appearance functions as a niche-category marker.

AI design considerations: A three-body stack whose two rear alignments converge on one entry; the shared contact point is anatomically demanding to depict plausibly, so prioritize one coherent pelvic angle over exaggerated visible separation.