Seated rear entry (lap ride)
M/F · Vaginal penetration · Seated
Posed figure
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Keypoint template
Attributes
- Position family
- One-on-one
- Primary act
- Vaginal penetration
- Partner arrangement
- Seated
- Penetration type
- Vaginal
- Facing
- Front to back
- Dynamics
- Riding
- Support / surface
- Seated on furniture
- Participant count
- Two
- Composition code
- M/F
- Source medium
- Video
- Physical difficulty
- Low
- Prevalence in adult media
- Common
- Intensity tier (compliance)
- Explicit
Common camera framing
Description: The penetrating partner sits; the receiving partner sits back onto their lap facing away, riding with feet planted or legs draped outside the partner's.
Variations: On a chair, couch, or floor; leaning forward onto the knees or reclining back against the chest.
On camera: Presents the receiving partner fully frontal to camera while both stay seated — a staple chair setup.
AI design considerations: A seated figure with a second figure seated on its lap, both facing the same direction; leg layering (inside vs outside) is the fiddly detail.
Historical provenance
Where this position appears in historical sex manuals, erotic art & literature · full timeline →
- Haimen-zai (rear-facing seat)Japanese (Edo period) →
Shijūhatte (the Forty-Eight Techniques) — Edo-period pleasure-quarter tradition · 17th–19th century CE
The Japanese named counterpart of the facing seat.
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
1boy, 1girl, hetero, reverse_upright_straddle, sitting_on_lap, on_chair, chair, sex_from_behind, spread_legs, vaginal
negative: bad_anatomy, bad_hands, censored, monochrome, 2girls, 3girls, 2boys, 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.
Haimen-zai (rear-facing seat)closeShijūhatte (the Forty-Eight Techniques)Attested source name. The Japanese named counterpart of the facing seat.
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: Push in, Arc (partial), Locked off, Tilt reveal.
Related positions
Part of the Erotic Pose Catalog open dataset · CC BY 4.0 · keypoints are idealised COCO-17 templates.