The Gap
M/F · Vaginal penetration · Kneeling
Posed figure
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Keypoint template
Attributes
- Position family
- One-on-one
- Primary act
- Vaginal penetration
- Partner arrangement
- Kneeling
- Penetration type
- Vaginal
- Facing
- Face to face
- Dynamics
- Thrusting
- Support / surface
- Flat surface / bed
- Participant count
- Two
- Composition code
- M/F
- Source medium
- Video
- Physical difficulty
- Low
- Prevalence in adult media
- Occasional
- Intensity tier (compliance)
- Explicit
Common camera framing
Description: The receiving partner's hips are propped high on a cushion while the shoulders stay flat, opening a visible gap between the lower back and the surface, and the penetrating partner kneels into the raised angle. The gap is both the name and the entire mechanism.
Variations: Height of the prop sets the angle, and the legs can be flat, raised, or resting on the partner's shoulders without changing the underlying position.
On camera: The lift keeps the contact point clear of the surface, which is why it appears constantly in production under a dozen different names.
AI design considerations: A supine figure with a wedge under the sacrum and daylight under the lumbar spine. Rendering the gap is the whole job, since a body flat on the surface is a different position.
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, missionary, on_back, hips_in_air, pillow, kneeling, on_bed
negative: bad_anatomy, bad_hands, censored, monochrome, 2girls, 3girls, 2boys, 3boys
Image to video (Thrust (deep))
long-range reciprocating motion along the body axis, full amplitude, torso following the hips, 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.
missionary fixes only that the receiver lies on their back facing the partner, and its wiki admits leg-locked, folded and legs-held forms, so it covers the catalog's missionary, stopperage and lifted-missionary entries as readily as this one. It discards the cushion wedged under the sacrum with the shoulders kept flat, the visible gap under the lower back that names the position, which hips_in_air and pillow restore only as raised hips and a pillow, not as the gap itself. anvil_position was passed over although its wiki sets an upturned pelvis apart from missionary, because the same wiki makes it a milder form of the piledriver, whose legs fold back, and this entry keeps its shape with the legs lying flat.
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: Arc (partial), Crane down, Push in, Locked off.
Related positions
Part of the Erotic Pose Catalog open dataset · CC BY 4.0 · keypoints are idealised COCO-17 templates.