You inspect the cage

It is a medium sized cage, roughly two meters long, one and a half meters wide, and one meter tall. As per the grand book: It is made of stainless steel, the door can be only opened with a key, the underside is padded, and the bars have a ten centimeter gap between them; more than enough to suck someone’s cock or get fucked in the rear, but too little for any hope for the slave ever getting out of here.

You take a deep breath, as you realize, you could be perpetually kept here, and still be of use for Mr. O’Brian. Or whoever else wants to play with you. This indicates it would be beneficial to go along with things, otherwise you will be long broken in before that door opens.