Training for a Fisting Pt 1 (4k)

The slave, naked and locked in chastity, is secured on top of the cage, limbs spread wide, exposing his vulnerable hole, ready to be stretched. His breathing is regulated by a gas mask and bubbler, keeping him subdued. I methodically work my fingers into the slave’s hole, starting from one and progressing to four, nearly inserting my entire fist. However, sensing the slave isn’t quite prepared, I opt for a gape keeper toy instead, sliding it into the slave’s hole and leaving him on the cage with his hole stretched out until he is ready.