Here is a fantasy of mine.

I have a fantasy where I am used by a man or two men (a Dom couple I guess).  Against my will, I am kept outside in a barn/stable shackled at the wrists and ankles, and collared.  All of the restraints are metal, inescapable, and connected with chains, and the collar is chained to the floor or wall. I can lie down somewhat comfortably, but I can't get up much past my hands and knees. When my users/tormentors come I beg and struggle against them so they place a bench underneath me that they fasten me to so I can't struggle.  I am used orally and anally, and they make sure to come on me instead of on me. When they are done they remove the gag and bench and urinate on me. I am left to lie in the dirt covered in cum and piss until they return. This happens a couple of times during the day and night and left to sleep like this for the night.  I am awoken the next morning by having a bucket of cold water thrown on me.  My chain is untethered from the barn/stable and I am led outside where I am chained again. This time I'm chained where I am standing up, my hands chained high above my head and my feet where they can move only an inch or two in any direction. I am sprayed down with cold water from a hose and then lathered up with a lot of soap.  I am given an enema and my teeth are brushed.  Next, they place a nozzle on the hose so that the water comes out with enough force that it stings as they clean the lather off of me. They make sure to give extra time to sensitive areas for added insult. After I'm clean, my hand and feet shackles are left on but unchained from their current location, and my collar's chain is chained down with enough slack that I can stand up and lean against something. I am given a lot of water, a very small bit of food, and allowed the chance to relieve myself without having to do it where I was laying. I beg then to let me go and they refuse, strip down, and order me to pleasure them. When I refuse I am led back to the barn/stable and process is started over.