I have always wanted to get caught masturbating since I was younger but haven't ever gotten the opportunity, so I planned on being in a situation where someone could walk in on me naked. I decided to go to a tanning salon to set up an appointment and, luckily, there was a fairly attractive girl working there and not someone older, or worse, a guy.
I had picked the last slot of the day so no one else would be there, and when it was my time I went to the room, stripped naked and started to tan. When my time was up, I wiped myself dry and sat down in the small chair they had in the room. I leaned back, got hard and started stroking myself. It took a few minutes after my time was up, but eventually she knocked on the door and walked in. Before she even got through the door, she saw me masturbating, gasped and apologized and walked out. She then cracked open the door again and said she needed to wipe down the equipment, and I said it was OK and to go ahead. She slowly came back in and tried not to look as she sprayed down the bed and wiped it off. Her standing there really helped me out, because all she had on was a tank top, tiny shorts and flip flops, and every time she would lean forward I got a great view of her legs.
The whole time she was doing this, every time she caught a glance she would try not to giggle, and that made it more fun for me. I started making small talk with her, just to get her to look at me more. Eventually I got bolder and told her she could watch if she wanted to, so she turned around and stood still as I stroked away right in front of her. We talked a little more and I knew I was about to cum, so I asked her if she would hand me my towel, and when she did, I scooted forward and started cumming on it. I don't know how many times I shot, but when I did it, she covered her mouth and spun around, trying not to start laughing. I thanked her and she said no problem and to come get her when I was finished. She then walked back out, I cleaned myself up and got dressed and walked out. When I was paying, she kept on smiling and couldn't even make eye contact, which just made it better. Obviously, that was the only time I ever went.