Right away Dr. Topinbottom walked back into the exam room while I was getting dressed and said that the sample he got wasn't going to be enough for the testing. I said okay, and he directed me to have a seat on the exam table once more. As I sat down, the Doc wasted no time in dropping to his knees and started to give me a blow job once more. One thing was for sure and that was the Doc knew just how to give a good blow job. The best part for me was when he would deep-throat my cock and coming back up he would use his hand to jerk me off. He used a combination of his hand and mouth, which didn't take long for me to get fully get hard. Dr. Topinbottom started to get hot with all his clothes on and from doing all that work, so he stood up and peeled off his shirt to reveal his white, pale chest. As he stood there to the side, I got off the table and walked over to him. I knew that was my indicator that he wanted me to give him head. Dropping to my knees in front of him, I reached up to help him take his pants off. Exposing his dick he was hung from just getting off, and horny for some more action and so I put the dick in my mouth and started sucking. As I moved my mouth up and down on his dick I could feel his boner in my lips getting harder. It's a big turn on for me when guys moan and make noises, because it goes to show that they're enjoying whatever happens to be going on. He had me pause for a moment and that was when he explained that I was going to get my revenge on him, and at first I didn't know what that meant. Topinbottom moved around the room getting a couple of things and handed me a condom to put on. What?? I was going to get to fuck the doctor in the ass. I mean I knew that he was into me, but I didn't know that much. Putting the condom on we started with him bent over the table just like I was, and just as I was about to push my dick in. I thought for a second before I did anything about taking it easy and that thought quickly went away. I pushed my hips forward shoving my throbbing cock into his very tight hole making him squirm and yell a little bit. It might sound cruel, but I loved every second of it. The sounds and the movements quickly changed, and the Doc was starting to like the fucking that he was receiving. I am not one of those guys that keep the same pace throughout the whole time we fucking. Changing up the pace I would go faster and slower, and also change the depths of how much dick I would put in his as at one time. Making those times when I would place my cock to go deep great for both of us. After a while though, the Doc wanted to change position and he got on his back. With him in this position we could look at each other as we fucked, and he was gazing at me the whole time. I knew that he didn't take a dick up the ass for just anybody, especially for as tight as he was. We kept the fucking up, until I got the sensation that I was going to cum. It happened so fast, I pulled my dick out and started to jack off over him. I ended up shooting several squirts of cum out on to Dr. Topinbottom's dick and lower stomach. He kept jerking off as well, and it only took him about another minute to shoot is load. After we were both done and tired, the Doc said that he really didn't need another sample he just wanted to have another chance to mess around. He told me I could come back to see him any time I wanted, but I hope that I will be cured for a while now.