When I was in college there was a pond out in the woods where people would go swimming. It was understood it was for skinny dipping. It was still a little awkward sometimes when you bumped into people you knew....
Took my wife to Wendover, Utah a couple years back! There is a lake 15 miles south and we went skinny dipping there!! She almost got caught by a couple of fishermen that showed up!!
@LynnUK I expect some did. I remember one guy I knew who was walking with his girlfriend. Im sure they were clueless and I was the only one in the pond that day. I stayed in up to my chest. They must have thought I was being rude.