My Super is a man in his early 50s. He's Italian, and quite masculine. His apartment is just below mine, and sometimes I heard his porns playing during the night. A few times I've even heard his moans while he jacks off. I'm not much for sexual expression, but once in awhile I jerk off along with him, and when I hear his moans getting louder, I let myself go.
One day, my shower was extremely cold, and I waited about 10 minutes with the water running, waiting for the heat to kick in. It didn't, and so I walked downstairs to knock on his door, and ask what was going on. He greeted me in a towel, and quickly glancing back and forth told me to come in. He apologized for his appearance, but wasn't expecting someone to be at the door. I laughed, and said I'd keep it brief. He didn't know why my water was cold, and said I was welcome to use his shower. I went in, and turned it on, realizing his water was ice cold too. I waited a couple of minutes, and then went out to tell him his water was cold as well. I walked through the living room and kitchen, and went toward his room, but stopped, because he was lying on his bed, completely naked, dick in hand, stroking it slowly and methodically. His dick was meaty and long. He could barely fit his fist around the shaft, while he worked it up and down. For being early 50s he was in great shape, and had obvious tan lines, across his muscular thighs, ending just below his pubic hair line. I watched his right arm flexing, along with his chest, with each stroke. I became aroused, seeing all of this.
He stroked for a few minutes, and I just stood there watching. He started to moan, and I knew he was close. After a few more strokes, he shot a huge load of cum high up in the air, which landed all over his body. He came again and again, with his face contorting and moans escaping his thick Italian lips. I slowly went back into the bathroom, and turned off the water, making obvious noises. I walked out of the bathroom, telling him he had the same issue, and I'd just wait to shower later. He had his towel wrapped around, and looked uncomfortable. I noticed he still had some cum spots on his hard chest and abs. I apologized for interrupting his day, trying not to look down. He smirked, and stuttered an "It's OK." I left and went upstairs to stroke one out.