I used to live on the second floor of a 3 storey apartment building. The complex had served as corporate apartments but were now let out to the common folk. A young married couple lived above me. Personable but I could hear them walking. Being very alone, and very lonely, and very unoccupied outside of work, the noise began getting to me. I asked them to not walk so loudly, to not slam cabinet doors etc. It wasn't just me, the walls were kind of thin and the people were loud. The girl who lived across from the couple was also loud, and sometimes I couldn't make out where the noise was coming from. Pretty soon, I began cranking up my boombox. Say hello to PSB, FF and all the good stuff I listened to. And still do btw.
Now the woman upstairs also had a problem with me making noise. To be honest, her husband, a gangly but well built and good looking lad, knocked on my door a couple of times to complain. I cordially turned down my TV or music or whatever. After that, I started to notice the noises from upstairs. I complained to the manager once or twice. Once I heard whimpering in the night, it must have been about 2am.
You have to understand this about me. I'm not a corrupt person, and still being a virgin (25 at the time), it didn't occur to me there was any sex in the picture. So several weeks later, when I heard whimpering at 11 and then again at 4am, even my innocent mind put 2 and 2 together. I masturbated mightily to the sound, and was disappointed at the end of the show.
Unfortunately, soon after that, the wife realised somehow I could hear them, probably because of all the complaining I had been doing. They stopped having loud sex, and I went back to my regular masturbation schedule. On occasion, I could hear the hubby moan and sigh in the living room as she sucked him off. It was not the same, I wanted to hear his cute wife whimper and shout as she came. As she had once done, all those years ago. Just a few years of my wasted life.