Spider (crab)

M/F · Vaginal penetration · Seated

Posed figure

Spider (crab) sex position — posed figure showing body placement for 2 people

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Keypoint template

PenetratingReceivingCOCO-17 template · schematic, not to scale

Attributes

Position family
One-on-one
Primary act
Vaginal penetration
Partner arrangement
Seated
Penetration type
Vaginal
Facing
Face to face
Dynamics
Grinding
Support / surface
Flat surface / bed
Participant count
Two
Composition code
M/F
Source medium
Illustrative
Physical difficulty
Moderate
Prevalence in adult media
Occasional
Intensity tier (compliance)
Explicit

Common camera framing

Side profileOverhead

Description: Both partners recline back on their hands facing each other, hips pressed together with legs interleaved past each other's torsos — bodies forming an X in profile.

Variations: One partner more upright than the other; rocking rather than thrusting drives the motion.

On camera: The mutual recline reads in profile; more common in position guides than in shoots because faces sit far apart.

AI design considerations: Two reclined seated figures joined at the pelvis with interleaved legs — the mirrored back-lean is the signature geometry.

Historical provenance

Where this position appears in historical sex manuals, erotic art & literature · full timeline →

  • El modefeda (Frog Fashion)Arab–Berber (Maghreb) →

    The Perfumed Garden of Sensual Delight — Muhammad ibn Muhammad al-Nafzawi · 15th century CE

    Heels drawn to the thighs, partner seated facing — al-Nafzawi's frog.

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, sitting, sex, vaginal, spread_legs, on_bed

negative: bad_anatomy, bad_hands, censored, monochrome, 2girls, 3girls, 2boys, 3boys

Image to video (Grind (rocking))

pelvis rocks forward and back through a short arc, contact never breaking, 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.

Expected figure count: 2. Global pose conditioning does not make a diffusion model count bodies. Count figures and limbs at full size before judging quality, because thumbnails hide the failure. The tag sitting is broader than this position: sitting records only that the butt rests on a surface and is not a sex tag at all. It discards every identifying feature of this entry: the mutual backward recline onto both partners' hands, the legs interleaved past each other's torsos, the hips pressed together into the X silhouette, the face-to-face orientation, the rocking rather than thrusting drive, and the vaginal penetration itself.

Identifiers in other vocabularies

How this position is denoted elsewhere, and what each mapping discards. Full table in the crosswalk.

  • sittingbroader

    sitting records only that the butt rests on a surface and is not a sex tag at all. It discards every identifying feature of this entry: the mutual backward recline onto both partners' hands, the legs interleaved past each other's torsos, the hips pressed together into the X silhouette, the face-to-face orientation, the rocking rather than thrusting drive, and the vaginal penetration itself.

  • El modefeda (Frog Fashion)closeThe Perfumed Garden of Sensual Delight

    Attested source name. Heels drawn to the thighs, partner seated facing, al-Nafzawi's frog.

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 maintained.

Idle / micro-motionPose settleApproachCaressEntryGrind (circular)Grind (rocking) (characteristic)RepositionClimax reactionAftermath

Camera moves that suit the geometry: Arc (partial), Overhead descend, Locked off, Pull out.

Also known ascrab positionreclined Xspider crab

Related positions

Splitting the bambooSpooningSquatting cowgirlStanding face-to-face (leg raised)Standing rear entry (bent over)Standing rear press (against wall)
Back to CatalogUse in Generator

Part of the Erotic Pose Catalog open dataset · CC BY 4.0 · keypoints are idealised COCO-17 templates.