Sadle and restraints fit for a masochist

Inside the stable you´ve set up a rack with a saddle over it and plenty of kinky restraints and painful toys. You first grab the saddle. "Let´s get you saddled up boy, then we´ll move on to the really fun stuff." Your centaur stays almost perfectly still as you put the saddle on his horse half and strap it on. Once that´s doen you fetch a special body harness and get up in the saddle, reaching around to put it on your centaurs human half and buckling it in the back. The harness has a corset built in along with straps up top to emphasize his pecs and nipples. Once that´s done you order him to kneel and then start to really restrain him. You fit his arms behidn his back with a bondage armbag, keeping his arms crossed behind his back strapped into a comfy leather bag.

You change his simple briddle and exchange it for a head harness with a metal briddle, horse blinders, and large plumes on top. Once that´s buckled on nice you tell him to stand up. "Time for the painful part." You grin, and fetch a specially ordered cbt set. You lean in under your centaur and see he´s already getting hard, although not fully yet. Smiling, you roughly grab him by his huge balls and give them aplayful squeeze, making him moan and causing his cock to shoot out even further.

While it gets fully hard you fit his huge balls through a set of metal rings, stretching them out. You then also pull a set of rings with bands between them over his massive cock, buckling it to the base. This both squeezes his cock, but also emgorges it due to the increased pressure. You give your centaur a few reasugint pats on his side. "This next part will hurt, so I want you to stay still. Understand?" He neighs. "Good boy." You then bring up a long thin metal rod and place it at the pisshole at the flat end of his massive cock. You then start to slowly and gently push it in, making your centaur scream, bite down on his briddle hard, and squirma roudn with his human half. Thankfully for you, his horse half stays quite still, only shuddering and stomping a bit.

Once its all in, you aling the ring at the end with a set of metal bar on the cock rings and put a padlock in, locking it in tightly.

Stepping back you see that he´s started sweating, shuddering as his massive cock is simultaneously squeezed and filled. You make an exagerated pout. "Now, what´s missing? What´s missing indeed?" You snap your fingers. "Ofcourse, how could I forget!" You pick up a massive horse cock shaped dildo from behidn the rack with straps at its base. "You´ve still got an asshole that needs to be filled."

You bring over a stool and, using plenty of lube, you use both your hands to warm up your asshole, eventually fisting him for a few minutes. You then align the horse dildo and shove it in, making him moan and drip pre-cum around the metal rod. You strap it in tightly around his hindquarters and then walk in front of him, pulling his head down by his reins to look you in the eyes. "Now that you´re all set up, let´s take you for a ride."...