Fire Hydrant

M/F · Vaginal penetration · From behind

Posed figure

Fire Hydrant sex position: posed figure showing body placement for 2 people

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Keypoint template

ReceivingPenetratingCOCO-17 template · schematic, not to scale

Attributes

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

Common camera framing

Side profileRearLow angle

Description: A rear-entry position on all fours with one of the receiving partner's knees lifted out to the side. The asymmetry opens one hip completely while the other stays planted, which is both the mechanical point and the source of the name.

Variations: The raised leg held by the partner or held under its own power, lifted to the side or carried forward. Swapping legs mid-scene reverses the angle.

On camera: The lifted leg opens the contact point in a way that a symmetric all-fours position cannot, which is why it appears so often as a variation beat within a longer rear-entry take.

AI design considerations: An all-fours figure with one hip abducted to roughly ninety degrees and three limbs still planted. The lifted side pulls the pelvis with it, so the hips should not stay level.

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, doggystyle, all_fours, leg_lift, sex_from_behind, 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.

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 doggystyle is broader than this position: doggystyle covers the whole all-fours rear-entry family and is the tag the catalog's doggy-style entry carries, and that entry's own description lists one leg raised among its variations. It discards the single knee lifted out to the side with the hip opened to about ninety degrees and the pelvis tipped with it, the asymmetry that names this entry, although the tag still holds because all_fours needs at least one hand and one leg on the floor. leg_lift in the support set carries the leg lifted away from the planted one.

Identifiers in other vocabularies

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

  • doggystylebroadershared with 6 other positions

    doggystyle covers the whole all-fours rear-entry family and is the tag the catalog's doggy-style entry carries, and that entry's own description lists one leg raised among its variations. It discards the single knee lifted out to the side with the hip opened to about ninety degrees and the pelvis tipped with it, the asymmetry that names this entry, although the tag still holds because all_fours needs at least one hand and one leg on the floor. leg_lift in the support set carries the leg lifted away from the planted one.

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.

Idle / micro-motionPose settleApproachCaressKissEntryThrust (shallow)Thrust (deep) (characteristic)Thrust and holdGrind (circular)Grind (rocking)Manual strokeRepositionClimax reaction

Camera moves that suit the geometry: Arc (partial), POV (head-mounted), Push in, Locked off.

Also known asraised leg all foursone knee up rearlifted leg kneel

Related positions

Fishes InterlockFixing of a NailFroggy StyleFull nelsonGangbang LineHalf-Pressed Position
Back to CatalogUse in Generator

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