For danbooru purposes, this refers to a form of [[bondage]] where the submissive's limbs are either bound or [[amputee|amputated]] so that they are forced to crawl on flexed elbows and knees. Typically uses [[bondage mittens]] to bind the arms and legs and to pad the elbows and knees.

h3. See also
- [[fake tail]]
- [[fake animal ears]]
- [[pet play]]
ヒトイヌ