It had been six weeks since my exam with the doctor. The first couple of days following my exam were the worst. Every time I went to the bathroom it hurt bad. Then the pain slowly got better but it still hurt to walk for a couple of more days. Then there was the learning to comprehend what he had done to me. Then there was also the fact that I had enjoyed it. I tried telling myself I hadn't but there was the fact I had. I had in fact ejaculated all over the floor at the end of the exam table. But that was over and my new job was going good. It was almost noon I had walked out to the parking lot to sit in my car and eat lunch.That is when I looked at my phone and saw I had a message from the clinic that I was supposed to show up at 4 this afternoon the doctor needed to see me it was important. That is when my heart started to race and I began to sweat all I could think of is what does he want with me? Then it was time to get back to work and the time until 4 went slow all I could do was wonder what he wants? Finally it was time to go. It was a short drive across town to the clinic when I got there and checked in there were only a couple of people in the waiting room. The nurse came out and called my name then escorted me back to a exam room. I noticed that when we entered the room that this one looked a little different than the one the last time I was here. It had a small desk and a padded bench to sit on she told me to take a seat on the bench and that she would check my blood pressure and take my vitals. As I looked around I saw there was a exam table over by the far wall a counter and some cabinets.Once she was done with my vitals she told me the doctor would be in and then left. When the doctor came in he offered his hand I reached out and shook it although I was a little reluctant to do so. He then told me he was glad that I had made it he took a seat at the desk and pulled out a file and flipped it open then began to ask how I was doing? I told him I was getting along fine he then asked how I had felt? the first couple of days following my last exam I told him it was kind of rough and gave him the details I had mentioned earlier. He told me that was to be expected seeings how it was my first time and that's why it was so important that I showed up today . He then went on to explain that today was mainly just a follow up. He knew I was doing good at my new job that he was good freinds with my employer and that I had a good future ahead of me if I make the proper decisions. I then asked what he was talking about? He then told me that my employer requires semi annual work physicals and if I want to pass mine I need to make the right decisions and did I understand what he is telling me? I sat there dumb founded not knowing what to say he sat patiently waiting not saying anything for a minute or two then spoke telling me that I know what he means and what is my answer going to be? that he doesn't have all day. I slowly spoke telling him that I needed my job and in order to keep it I would have to pass my physicals. So I would have no choice but to submit to what ever he wanted. With this being said he smiled and told me that I had made the correct decision and hoped that I won't have any regrets. And now we should get started. He pushed himself back from the desk looked at me and told me to stand he wanted to give me a quick rectal examination. To make sure I was ok when I was standing he then told me to strip and I mean everything did I understand? I told him yes I understood and began to strip. When I was completely naked I was told to stand in front of him turn around and bend at the waist then reach back with both my hands and spread my cheeks wide. He wanted to visually examine my anus. Once I had my cheeks pulled open I could feel the cool air on my hole and then the embarrassment of knowing he was looking closely at my hole, knowing it was dirty I hadn't been able to shower before I got there.When he was done looking the doctor told me that would be good enough it looked healed and was time to continue. He then told me to turn around and face him. He then informed today was going to be a little different. Than the last time I was there he then instructed me that today he was first going to use me in a different way then grabbed my penis and started to stroke it. He looked up at me and said he wanted to make sure I could get erect. This time we both know what is going to happen to day don't we? I just shook my head yes as he continued to stroke my penis I began to get erect he asked if I was ready for today? I said I was not quite sure what he meant. He then asked if I knew why I was there? I told him I thought I was there so he could do to me what he had done to me the last time I was there. He told that was just part of it today I was there because he wanted me there. Today I was there to be further broke in and trained in what ever way he wanted and now do I understand? And was I ready? I replied that I did understand.And yes I was ready. He then stood up in front of me placed both of his hands on my shoulders and looked me in the eyes then explained to start with I was going to please him orally. This is when my heart stopped and fell into the bottom of my stomach. Then the doctor was telling me to kneel. I froze and then in a stern voice the doctor told me again, ordered me to kneel I began slowly lowering myself to my knees. Then the feelings of embarrassment and humiliation began to set in knowing that I was about to take another man's cock in my mouth and there was nothing I could do to stop it.When I was finally on my knees I watched in horror and disbelief as the doctor started to unbuckle his belt and then unsnap his slacks. And slowly lower them until his cock and his balls were dangling directly in front of my face. I could smell the musty stink of his crotch. By now my brain was numb and his voice sounded far away. Has I hear him telling me to open my mouth and take ahold of his penis and taste it. I couldn't move at first I tried pleading with him please don't make me do this that I have never done this. I don't know how he just told me to relax you will learn. Now open your mouth and take me in as I took his cock in my hand and slowly guide toward my mouth I seen him smile.I took my tongue and reached out to taste the tip of his penis the first taste was salty and I thought it was probably his dryed urine and I started to gag. I then hear him telling me to relax and calm down. I will be alright he is not going to hurt me just relax and let this happen. As begin to suck him I can feel his cock start to grow now he is getting hard in my mouth. Some how this is starting to turn me on I feel my own cock getting hard. As I continue to suck the doctors cock it has become swollen and is throbbing in my mouth. As he begins to moan I start thinking he is going to ejaculate in my mouth. I have never tasted cum I don't know what to expect this is the first time I have ever sucked a cock. But then very abruptly he tells me to stop. He doesn't want to cum yet. He tells me he is saving it for my ass. He then tells me to stand and for me to walk over to the padded bench where I was sitting earlier. And to kneel on the bench to stick my butt in the air and to rest my chest on the bench and arch my back. This makes my bottom stick out over the end of the bench. I'm fully exposed in this position and now the feeling of submission sets in. As I watch the doctor walk to a cabinet and grab a bottle of lubricant but no gloves. And I realize he is not going to use gloves just his bare fingers to prepare my asshole. Then he strips off his pants and walks back over behind me. Then in very stern and direct voice tells me to reach back and spread my butt cheeks to spread them wide. He wants to see my pink puckered hole. Then I feel cold lubricant running down my crack and over my hole. Now I have become very nervous and anxious knowing that now the doctor is going to butt fuck me he is going to use my asshole to finish himself off. I hear him telling me in this position he will be able to penetrate me deeper than he was able to the last time. And I need to ready myself and if I think it will help me to endure this I can jack myself off. Then I feel his finger touching my butthole then I hear his words telling me to relax. I know next his finger is to going penetrate me. I feel it push into me. I feel my asshole open involuntarily at first then tighten. When I start to think about what he is doing to me. My balls tighten and my cock starts twitching. Knowing that in a very few minutes I am going to feel the doctors very large cock enter me. I try to ready my mind for what is about to happen to me. I feel the doctor pulling his finger from my ass. Telling me I'm ready. He tells he wants me to start bearing down like I'm trying to go to bathroom. I feel him place the head of his cock at my entrance and rub it up and down over my hole gently pushing. Then he is telling me he is going to push in all the way with one long slow thrust. I need to bear down hard and open myself or it will hurt bad. I tell the doctor I am BEARING DOWN HARD! I feel like I'm going to go to the bathroom. By now I have become light headed and feel far away. I can hear him telling me not to worry. I won't be able to go to the bathroom once his cock is up my butt. Then with nothing more said I feel him thrust! I feel his large cock split and force my hole open and slither it's way into me. I hear myself half grunt half scream as it painfully stretches my asshole and fills my insides. I can hear my hole making disgusting noises as the air is forced out of my rectum. Then I can feel the doctors balls smack up against my own. Now he is buried deep all the way up my butt. Now I know. I am being dominated and have no choice but to submit to this. As the pain subsides he begins to pump my butthole. I realize that have reached between my legs and have begun to stroke myself. I hear the doctor grunting telling me that my ass feels good it's very tight! he won't be able to last very long and he is about to cum. I hear myself moaning with an occasional grunt. Telling, begging him to please finish as he is slamming against me. I realize that I am liking this it feels good. It's making my ass feel full. My hole is starting to clench as my cock is aching. Then I feel the doctors big cock start to spasm. Then I hear his grunts he moans loudly. I feel his seman spurting into me. Then mine own all over my hand as I start to ejaculate. Then the empty feeling in my asshole as his cock has shrunk and has slipped from my hole. Then he is telling me to stand up. When I finally am able to make it to my feet I'm wobbly and weak. I feel the wet mess running out of me and down my legs. As I turn around and look at the doctor. I can see his cock is covered with slimy cum and runny wet lube and even some of my filth. Seeing my filth on his cock I feel ashamed and embarrassed. I hear him telling me I did even better this time that I'm learning. Now I can get dressed. He will see me again in few weeks and is looking forward to my next appointment. That he will let me know when it is scheduled.