Now, I know teenagers can be very inventive and most will find somewhere where they can explore sex. Between Seaford and Eastbourne, there is a river valley with a lovely walk of a couple of miles from the car park to the sea. Along the route are old concrete WW2 pill boxes. (Bunkers) Most of them are accessible and sometimes I like to visit each of them in turn. They smell damp or course, but more than that, they often smell of sex. Usually, there are discarded items of clothing in there too. I like standing there imagining a couple of teenagers getting it on in the sordid, smelly surroundings. There is nearly always a faint smell of pee there too. This particular day was hot as all hell and I had gone into the fourth bunker. In it were a pair of white cotton panties and a note written in chalk on the wall that said 'Finally done it. Yipeee'. Hanging on a nail near this sign were the panties. I leaned back against the wall and started to finger myself through my own panties. Through the little observation slit, I saw a party of high school aged girls sitting on a bank, drawing the river valley. They were sitting with their knees up and two of them wore skirts which meant a clear view of their panties. One had white ones on, but the other had a green pair that clearly showed a dark patch. I masturbated and listened. They were talking about sex. One said 'See that bunker? I got fucked in there last night.' They were HER panties on that nail. So I took them down and smelled them as I gave myself a lovely orgasm. Looking up her skirt, smelling her pussy and doing myself almost in public. It doesn't get much better than that!
It did this time though, because one of the girls said 'Fuck, I need a pee.' She walked away from her group and up against the bunker where I saw her squat down. There was a low level observation slit that let me see her tug her white panties down and pee. That set me off again and just as she got back to her friends I came again in a long series of sighs. Just before I went on my way, I slipped my own panties off and hung them on the nail before putting the girl's panties on. Let me tell you, there is nothing more horny than having another girl's pussy against your own, especially when you KNOW she has been horny in her panties. I could imagine her making out with her BF, kissing, touching, fingering before she did it with him. By the time I got back to my car I was ready again, but I held off until I got home.