I went to the gym last night and when I went in to the changing room I saw a girl who worked there cleaning the floor. I immediately thought I had gone through the wrong door and had gone into the ladies changing room by mistake. The girl looked at me and must have realised the shock on my face and asked are you ok with me in here? I replied youre ok; I thought I had gone into the wrong changing room. There were a couple of other guys in there just finished getting dressed and they left shortly afterwards leaving just me and the girl in there. She kept on cleaning while I got my clothes out, she told me theres never a time when the room is completely empty until they close at 11, and she had no intention of staying back after that to clean. I stripped down to my underwear ok; it felt such a thrill undressing in front of her. I had a need to be there, she was really the intruder invading my privacy. I didnt want to strip nude and then stand talking to her because it would have made it obvious I enjoyed it. I turned my back to her then took off my underwear and put my gym shorts on, during this I turned slightly to get my shorts out of my bag so she could see what I had. I wasnt hard but certainly wasnt soft; she could easily see what I had as I was packing it into my shorts as she was facing towards me. Later I see her in the gym; she looked me in the eye and gave me a really cute smile. I really want to do everything to get to know her now. Im back there tomorrow night.