I Wasn't Expecting This

To understand how this happened you're going to need a little bit of backstory so bear with me for a second. The living conditions in my dorm when I first started college, were so terrible that I almost quit school after winter break. There were 4 of us in one room that I still believe today was only meant for two people, it was a narrow room with built in bunkbeds on both of the longer running walls; despite only being just over 6 feet my ankles hang over the edge of the bed one of my roommates who was almost 6'4 had it even worse than I did in that regard. We were not allowed to have a fridge or microwave in our room and the kitchen we did have access to was always filthy and our food was constantly being stolen from the fridge. The heat in the building never seemed to work and there was never any hot water in the bathroom or privacy, the showers were 4 floor to ceiling pipes with three showerheads on each in the middle of the room and most of the toilet stalls didn't have doors. I was seriously considering not going back when I got an unexpected offer, I didn't know it at the time but the father of one of my friends had recently moved very close by to my school. I had been telling my friend how horrible it was and he had asked his father to look into alternative living situations for me, neither myself nor my friend ever expected his dad (David) to invite me to live with him but when he did I couldn't refuse; it was both super convenient and a huge relief. The apartment was amazing and I was super grateful to David for letting me stay with him. The privacy situation still wasn't that great as the bedrooms were connected by the bathroom, meaning if you were in the bathroom you could hear what was happening in the bedrooms and if you were in the bedrooms you could hear what was happening in the bathroom; which also meant it was very easy for us to walk in on each other accidentally. The first time I walked in on David he was masturbating in the shower, I wasn't expecting him to be home and I had headphones on so I couldn't hear the water running. I was super embarrassed but he was really cool about the whole thing he just laughed it off and said it was bound to happen eventually. Despite how embarrassed I was I was also mesmerized by David's body, he was 44 at the time about 6'2 and exceptionally muscular and furry chested, he had black hair and green eyes, always with a bit of stubble on his face and a 10 inch uncut cock. Every night after that I would lay in bed naked stroking my cock thinking about what I had seen. A few days later we both walk in on each other and burst out laughing, we opened our respective doors to the bathroom at the same time, completely naked and both of us intending to take a shower. I think it was the next day that he walked in on me again, I was changing after showering and had left my door to the bathroom open; when he opened his and could see right into my room. The next time he walked in on me it was the same as the first time I had walked in on him, I was jerking off in the shower and he walked in wearing headphones (he later admitted that he heard me jerking off and catching me was a set up). It just seemed so funny to me that the same thing was happening in reverse that I couldn't even be embarrassed about it. The next time he saw me naked was because he was being playful, I had just finished a shower and had gone to the kitchen for a glass of water, only wearing a towel. When I was filling my glass he grabbed my towel and when I turned him to in surprise he had a huge grin on his face and said "what? It's nothing I haven't seen before" he winked at me and ran out of the room laughing; still holding my towel. I got him back for that the next day when I snuck into the bathroom as he was showering, opened the shower door and tossed a pan of ice water all over him. (sidenote that started a prank war between us which I will not go into). The next time I walk in on him it was a different scenario and it's what started all the fun. My last class of the day had been canceled so I got home about three hours early, when I walked into the apartment I was greeted with the site of David, laying on the couch, completely naked and masturbating as porn played on the television. I froze for a moment until David said "I don't care if you see but close the door before the neighbors do". I closed the door with a slight laugh and when I turn back around I saw that David had resumed masturbating, I thought to myself I guess he really doesn't care if I see and as if he was reading my mind he said "this keeps happening so we might as will just be open about it". I've had more than my fair share of jerk off buddies in my life, even at that point but I still couldn't manage to shake off my shock. David was completely ignoring the TV and staring straight at me, I wasn't sure if he was putting on a show for me or if he was expecting me to say something; probably both. I'm not sure how long I watched him but eventually he moved his eyes for my face, to be extremely noticeable bulge in my pants and asked if I wanted to join him. I took my clothes off as I walked over to the couch and was naked it by the time I reached it. He sat up to give me room to sit next to him and resumed playing with himself, after a few minutes of the two of us jerking off together he asked if I wanted to switch it up I nodded and he took over for me, he was slow and teasing with his movements as he jerked me off he kept me going for well over an hour before I was finally cuming; I was covered and cum from my chin down to my stomach. I was jerking him off the whole time he was jerking me off but he only wanted me to keep him hard, now that I had cum he wanted me to you jerk him off properly. When he was getting close to his climax he suggested we move things to the shower, an idea I eagerly excepted because my torso was getting kind of crusty and I had been jerking off for months to the thought of him wet and naked in the shower; having him shoot his load all over me in the shower was definitely better than any of my fantasies in been. After that we jerked off together pretty much every day and even though our relationship was not romantic, we also slept in the same bed most nights.