Train (rear-entry chain)
MMF · Mixed · From behind
Posed figure
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Keypoint template
Attributes
- Position family
- Group
- Primary act
- Mixed
- Partner arrangement
- From behind
- Penetration type
- Multiple / other
- Facing
- Front to back
- Dynamics
- Thrusting
- Support / surface
- Flat surface / bed
- Participant count
- Three
- Composition code
- MMF
- Source medium
- Video
- Physical difficulty
- Moderate
- Prevalence in adult media
- Occasional
- Intensity tier (compliance)
- Explicit
Common camera framing
Description: The receiving partner holds all fours while a kneeling partner enters from behind, and a further partner kneels behind that one: the same rear-entry link repeated down a line, every body facing the same direction. The term also covers the sequential practice in which partners take the rear position one after another rather than forming a literal simultaneous chain.
Variations: Group scenes extend the chain with additional same-direction links; the rotation format instead cycles fresh partners through the single rear slot in turn.
On camera: A wide profile is the natural frame; the repeated silhouettes stacked along one axis are what identify the arrangement at a glance.
AI design considerations: Model one rear-entry pair, then duplicate the offset: each added figure copies the same spacing and kneel height down the line. Keep hip-to-hip registration consistent from link to link, or the chain reads as separate couples.
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
2boys, 1girl, love_train, penetrating_while_penetrated, doggystyle, all_fours, kneeling, on_bed
negative: bad_anatomy, bad_hands, censored, monochrome, 2girls, 3girls, 1boy, 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.
- love_trainexact
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), Pull out, Locked off, Push in.
Related positions
Part of the Erotic Pose Catalog open dataset · CC BY 4.0 · keypoints are idealised COCO-17 templates.