The Rainbow Arch
M/F · Vaginal penetration · Side-lying
Posed figure
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Keypoint template
Attributes
- Position family
- One-on-one
- Primary act
- Vaginal penetration
- Partner arrangement
- Side-lying
- Penetration type
- Vaginal
- Facing
- Head to toe
- Dynamics
- Grinding
- Support / surface
- Flat surface / bed
- Participant count
- Two
- Composition code
- M/F
- Source medium
- Illustrative
- Physical difficulty
- Advanced / athletic
- Prevalence in adult media
- Niche
- Intensity tier (compliance)
- Explicit
Common camera framing
Description: Both partners lie on their sides pointing in opposite directions, the receiving partner arched backward so the hips meet while the heads are at opposite ends. The arch is what closes the distance, and the curved body line is where the name comes from.
Variations: Depth of the arch, whether the upper leg is raised or left down, and how far the shoulders rotate toward the mattress to relieve the spine.
On camera: An overhead shot is the only framing that makes the opposed orientation obvious. In profile it can be mistaken for an ordinary side-lying position.
AI design considerations: Two side-lying figures with heads at opposite ends and a pronounced backward curve in one spine. The head-to-toe orientation is the identifying fact and is routinely lost when a render mirrors one figure instead of reversing it.
Historical provenance
Where this position appears in historical sex manuals, erotic art & literature · full timeline →
- The rainbow archArab–Berber (Maghreb) →
The Perfumed Garden of Sensual Delight · Muhammad ibn Muhammad al-Nafzawi · 15th century CE
Partners lying on their sides in opposite directions, the receiving partner arched back.
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, on_side, arched_back, lying, 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.
Identifiers in other vocabularies
How this position is denoted elsewhere, and what each mapping discards. Full table in the crosswalk.
- no identifier existsnone
Relation is none, so there is no mapping and nothing for a loss statement to measure. No tag names this opposed, head-to-toe side-lying union: a tag-name search for head-to-toe in any spelling finds nothing, 69 requires the genitals at each other's faces, and on_side was not taken as a broader primary because the head-to-toe orientation, which the record calls its identifying fact, has no tag at all. The support tags reconstruct only the shared posture and the arch.
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.
Camera moves that suit the geometry: Overhead descend, Locked off, Crane down.
Related positions
Part of the Erotic Pose Catalog open dataset · CC BY 4.0 · keypoints are idealised COCO-17 templates.