Alternating Partners
MFM · Vaginal penetration · Receiving partner on top
Posed figure
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Keypoint template
Attributes
- Position family
- Group
- Primary act
- Vaginal penetration
- Partner arrangement
- Receiving partner on top
- Penetration type
- Vaginal
- Facing
- Variable
- Dynamics
- Riding
- Support / surface
- Flat surface / bed
- Participant count
- Three
- Composition code
- MFM
- Source medium
- Video
- Physical difficulty
- Low
- Prevalence in adult media
- Common
- Intensity tier (compliance)
- Explicit
Common camera framing
Description: One receiving partner between two who take turns rather than working at once, swapping on a rhythm while the waiting partner stays in contact by hand or mouth. It is the most common three-person arrangement in practice and the least often given a name, because at any instant it looks like an ordinary two-person position.
Variations: Any two-person position can be the live half; the swap is what makes it this arrangement. The waiting partner at the head, the hip, or simply alongside.
On camera: The swap is the reason to shoot it, so takes run long enough to include at least two rotations. Wide profile keeps the waiting partner in frame, which is what signals the arrangement.
AI design considerations: Two figures actively engaged and a third clearly present but not in contact at the pelvis. The idle figure's posture is what tells the viewer this is a rotation rather than a double.
Generating this position
A starting prompt composed from the catalog vocabulary. Every tag is verified to exist and not be deprecated. Compose across wardrobe, scene and expression in the prompt builder.
Booru-tag checkpoints
2boys, 1girl, group_sex, cowgirl_position, straddling, on_back, seiza, on_bed
negative: bad_anatomy, bad_hands, censored, monochrome, 2girls, 3girls, 1boy, 3boys
Image to video (Ride (bounce))
upper figure rises and drops vertically, thighs driving, torso upright, camera is locked on a tripod and does not move.
Motion only. The still you condition on must already carry the position, wardrobe and scene: restating them causes drift.
Identifiers in other vocabularies
How this position is denoted elsewhere, and what each mapping discards. Full table in the crosswalk.
group_sex records only that more than two participants share a sex act at the same time, and it is the tag the catalog's gangbang-center, reverse-gangbang and doggy-over-69 entries already carry. It discards the rotation that defines this entry, two partners taking turns with one receiving partner on a rhythm while the waiting one stays in contact by hand or mouth, along with the MFM composition. At any instant the live half is an ordinary two-person position, by default a ride on the supine partner, and no live tag was found for the swap itself.
Actions this position admits
The position fixes who is where. These are the beats that are physically possible in it, from the action catalog. Contact through the characteristic beat is intermittent.
Camera moves that suit the geometry: Locked off, Pull out, Pan / follow, Arc (partial).
Related positions
Part of the Erotic Pose Catalog open dataset · CC BY 4.0 · keypoints are idealised COCO-17 templates.