Fucking Machine Predicament

My slave has his legs spread and set in place with spreader bars and his upper body held in support by chains and a metal pole thread through his armpits behind his back, hands cuffed. in between his widely spread legs i have set up a fucking machine. i instruct my slave to mount himself onto the mechanic and control operated cock and i proceed to have my fun with him, turning the dials up and down at my will, teasing him, enjoying his moans of pleasure and screams of pain, toying with his erect cock weighed down by a steel cock ring. he is my play thing and i will use all of his parts in any way i will.