Watched in The Changing Room

I used to go to my local public swimming pool each week to do some laps and to stay trim. Since my work was mainly shift work, I tended to time my visits when the pool was fairly empty. This incidence that changed my sensual life forever happened on a mundane Wednesday afternoon. I had completed my usual 50 lengths, climbed out of the pool and returned to the male changing rooms for a quick shower and change. Normally I am shy about being naked in front of people and one reason I chose this pool was it had individual changing booths with curtains. However, since I was was the only one in the changing room I thought I might take a proper shower naked. Most men did but until then I had always kept my costume on. While showering I started to get stiff. Either it was being naked in a 'public' place or the feeling of the soap and water on my body ... but within minutes my cock the as at full mast. I began to slowly stroke my cock, using my shower gel. I cleaned my asshole a lot too since I love the feeling of having my hole stroked as I masturbate. The sensation was amazing, knowing someone could walk in at any moment. After several minutes the nerves got the better of me and I decided to call it a day, grabbed a towel and walked back to the changing room and my booth. Inside the changing room was a desk area where you could hand your clothes to an attendant to be put in a locker. I walked up to the desk and to my surprise a cute 18 year old blonde girl was sitting behind the desk. Every time until now it had been a guy. I was a little shocked since it was not uncommon for men to walk around naked in the changing room. I stood there with just the towel held against my front and stammered my locker number. I think she could tell I was uneasy and as she returned my bag, she smiled awkwardly and said they were short staffed today and she had been posted here since I was the only man swimming. It felt strangely sexual to be chatting to this beautiful girl naked, except for a towel held across my middle, like nothing was unusual. I said no problem,and turned to enter one of the changing booths . As I took the 5 strides to the booth it suddenly occurred to me that I was completely naked from behind. My cheeks flushed as I quickly entered the booth and pulled the curtain across. Peeking out the gap between the curtain and the wall I could see her staring my way with a slight smile on her face, so my ass had obviously made a good impression! The thought that she might like seeing me naked started to really turn me on and my cock hardened again. I could not help but gently massage it. I stood totally naked holding my hard cock, just 10ft from a beautiful girl with only a thin white curtain between us. I somehow felt no shame since I was in a men's changing room and she was not really meant to be there. Then a naughty thought occurred to me, what if she saw me through the curtain gap - I had an overwhelming urge to let her see me. So pretended to knock the curtain as I was drying myself, so it opened about 3 inches. Then I stood drying my hair so my nakedness and hard cock were visible to her desk. I thought I heard a quiet gasp and immediately thought oh shit she was going to call someone. So I pulled back behind the curtain and looked though the much smaller gap on the other side. There she was staring at my booth with her hand over her mouth. When she lowered her hand she had a broad grin on her face. As far as I could tell she looked like she enjoyed my show. So I decided to repeat it. This time I looked cautiously out from under my towel as I dried my hair. She was just staring with a smile right at my bobbing cock. This excited me even more. This beautiful girl, who I did not know, was enjoying staring at my naked body. I could not keep the pretence up of not knowing for much longer, since it does not take that long to dry your hair. So I stepped back behind the curtain to think. I so wanted to just stroke myself in front of her but thought it would scare her. So instead I simply got slowly dressed in full view, trying to leave my underware to the last minute. The whole time she watched intently and did not seem to mind that I knew she was watching. Just as I pulled my socks and t-shirt on, but still naked around my waist, she got up, came around the desk and up to my booth. She whispered through the curtain 'Sir, you should be careful to close the curtain if you want privacy when changing'. I stood up having just put on my second sock and opened the curtain saying that it was alright I was not shy about nudity (a complete lie but my brain was not functioning). My cock stood to attention between us. She stood only a few inches from me. She looked a little surprised and said I can see that. I then involuntarily brushed my cock with my hand. She just continued to stare. Taking this as a signal to continue I proceeded to give my cock a couple of slow full length strokes. Pre-cum dribbled from my pee hole. Without taking her eyes off my throbbing cock, she said to me you really should not be masturbating in here. My cheeks flushed again and I realised there was no pretence now. So I apologised and said sorry I was just so turned on. Her smile returned and she whispered just finish quickly. I thought she would leave but she stayed standing there and watched me as I increased the speed of my stroking. My senses were bombarded by the sight, smells and sounds of this young girl. Her perfume was intoxicating, I could hear her breathing deepen and her eyes betrayed the raw lust she was feeling. As my orgasm built I stepped back into the booth and sat on the small bench. I was now thrusting into my hand. My foreskin slid up and over my purple cock head with each stroke. Then I started to convulse and had the biggest orgasm in my life. I squirted all over the tiled floor, my spunk slapping the floor with splat noises. Finally I calmed down and could focus again. The girl had brought me some tissues to clean up with. She smiled as she handed me the tissues and thanked me. She thanked me! Not much more was said as I cleaned up and finished dressing. As I left she said see you around - hope you enjoyed your swim. I did return to the pool many times more but the desk was always attended by a man. I saw her a few more times and she always smiled at me and waved. I did get to know her better on a few more occasions but that can wait for the next story.