I'm already naked in in steel shackles and collar when you order me to get into the cage and lock it with padlocks. It's time to train me to become a more efficient fuck-toy, and for this purpose you've mounted two massive dildos in the cage, for me to practice sucking. You also make me repeat humiliating phrases about how I want to be used, and how I'm nothing but a collection of holes for you to fuck. First you instruct me to suck the wall mounted dildo, then to deep-throat the other dildo from below, to ensure it goes as far as possible down my throat. The tight steel collar makes these task more difficult, and in between, you make me display my body for you as best I can through the bars of the cage. Finally, you want to see me put the biggest dildo on the floor and sink down onto it, taking it's entire length into my pussy. You order me to stay that way, with the dildo buried deep inside me, as I take the other dildo down my throat and keep it there. An hour like this, and you hope I'll never forget again what I'm for!