Watched while jerking off in a camping shower

I was single at the time and camping with a mixed group of college friends/acquaintances. The campground had two side by side shower stalls, that shared a dividing wall. Above and below the walls it was open pretty much like restroom stalls. The water to the showers was heated with an on-demand gas heater, and each shower had it’s own. To say they were difficult to operate and were very touchy would be an understatement.

I was showering in one, and no one was in the other at first. Then I hear the door open next door and the water turn on. After about 2 minutes a female voice said (embarrassed) Do you know how to work this fucking thing? I recognized who it was, and it was a girl I didn’t personally know but had interacted with a bit on the trip and very slightly flirted with. I explained the method for getting the setting just right, and she tried for a couple minutes but told me it still wasn’t working.

At this point, the act of having a completely naked conversation with a girl in the next shower was getting me hard, and we all know how tempting soap is so I soaped up my dick and stroked it a little bit.

She told me again how it was either ice cold or burning hot, and with my horny levels rising (and exhibition kink) I told her to just look over the wall while I showed her how to adjust it on mine. She laughed and asked if I was serious and I told her I really didn’t mind and I wouldn’t even look at her. The wall was too high to just look over so she moved a small little cabinet thing over. Before actually looking she asked again if I was serious and I said just do it.

She popped her head over and immediately said oh my God! I was down to just a swollen soft dick at this point, but she apparently was expecting me to be covering myself. I could feel myself swelling up without even looking down at it, but I showed her how to work the heater as promised. Knowing she was looking I quickly became rock hard without even touching it.

After she said she understood how to do it she kept her head over the top and was still looking at my cock. I was so turned on that I just smiled and started stroking. Within about 30 seconds max I was already at the point of no return so I started going faster and shot a big load of cum out. One giant spurt and a few smaller ones as I kept stroking. Again she said oh my God! When I was spent she went back to her side and took her shower. We interacted during the rest of the trip but never mentioned the shower again.