In college I worked at a summer camp. One session ended and we had 24 hours before the next session started. 3 of the girls asked me to go with them to a private lake owned by one of their uncles. We were swimming and had a couple of drinks, then one of the girls said I dare all of us to go skinny dipping. That said, we all stripped down and were playing with each other in the water, but we were having trouble maintaining balance in the water. Two of the girls laid down on a blanket while the third girl took me to one of the cars and straddled me. While we were fucking the other two girls caught us and they each wanted a turn as well. We decided the blanket was the best place so all could watch and join in. With the fucking and the drinking, we woke up later and it was dark. We laughed, decided enough drinking, but not enough fucking. We went back to her uncle's place after midnight and cleaned up... meaning I got to fuck each one in the shower as well.