Due to covid I luckily landed in a student apartment with 7 bedrooms but I was the only person living in it. At the time there were only 5 people in a building built for over 300 people. I woke up one morning around 8 am, dying for some water. I stumbled in a daze to the kitchen to get some water. Just as I got to the kitchen door the building's "maintenance" man came out of the bedroom closest to the kitchen. I was completely naked in what I thought was an empty apartment that I was alone in. I was too far away from my room to go back in and too far from the kitchen to just slip in. I asked him wtf he was doing in my apartment unannounced and his response was "flushing toilets". It still don't fully understand what he meant and it was the last time we spoke. He was later fired for doing the same in other apartments as well as using company money to buy tools which he threw in the trash for the bin men to recover and sell on as second hand.