Years ago, I went on a ski trip with an FWB. We stayed with a friend of his, and the three of us became very well acquainted!
The next day, after skiing, I wanted to shower for the night's activities. My date and our host said they'd invited a few friends over. They told me not to bother dressing after my shower, as it was a very open and informal group!
Of course, I got done and walked totally nude into a roomful of fully- clothed men! I was surprised by how uninhibited I was; once the initial shock wore off, I just went with it and remained naked the rest of the evening!
My first wife used to show me off to her woman friends as they sat around drinking wine....I LOVED being naked in front of them while they were clothed and I loved all the attention!
I wouldn't say I have had any particularly "exciting" encounters, mainly just occasional conversations on the fairly-local clothes-optional beach.
Had a rather odd one there though, a couple of years or so ago.
Beyond the main beach is an area covered in boulders, with a low, sloping cliff topped by small grassy clearings between luxuriant bushes. I was in such a clearing, just back from the edge, chatting to another man already there - we'd greeted each other as I walked past then returned from the end of the beach.
Though both nude, we weren't doing anything, not touching, just talking normally; when we noticed a newcomer barely ten, nearer five, yards away on the fringe of the clearing. We'd not seen him arrive.
Clearly a voyeur, we thought, but apparently more interested in a 'phone conversation about some problems with someone at work - we could hear his side clearly. He didn't look in our direction, not noticeably anyway, nor speak to us.
He was there for a good fifteen or twenty minutes, then 'phone call over, he scrambled back down to the beach and wandered away. Perhaps he was fed up with our lack of "exciting" action - perhaps hadn't occurred to him strangers might accidentally meet and just talk even if in their birthday-suits.