I was 17 when I went on a weekend trekking strip with a group of male and female friends. After hours of walking and sweating, taking a bath in the ice cold waters of the many rivers and ponds was a normal thing to do. Of course it had to be done in the nude up stream while guys did it down stream. I still remember the shock of going in the water, my nipples getting hard as rocks and being the last girl out looking for her clothes. Felt even colder when I saw my girlfriends laughing, holding up my clothes and back pack running down the trail and realizing I'd been pranked. Some how the thought of being stranded nude made me worm up instantly. If I knew my girlfriends well this was going to turn into a very embarrassing situation. They went straight down stream and almost could see them waving my stuff in front of guys. Minutes later my heart turned over when I hear guys voices coming towards me and found myself desperately running for cover, a hard thing to do when your bare footed and stark naked. Didn't get very far and basically forced to give the most humiliating strip show to a bunch sex crazed guys. They did nothing but make comments about how good I looked naked, how nice my tits were and kept looking between my legs. I never felt so exposed, embarrassed and helplessly standing in broad daylight. I got my stuff back, but at the coast of exposing my goodies to public view. I know they were all friends and had gone skinny dipping together plenty of times, but this was intended to be sexual without actually having sex. What made it so embarrassing, was giving guys the freedom of looking at my tits and pussy closer that they ever had seen them before. Embarrassing but very erotic in a certain way.