It happened when my wife and I were staying at a really nice nudist resort in Tucson, Arizona.
We met a nice local couple, Connie and Dave. They were probably in their early 50s, a few years younger than us. Like us, they had a few extra pounds, but they were both attractive. She had really nice curves. Unlike most of the other women at the nude resort, she was not shaved and had a full bush. He was shaved down there. In fact he had a nice circle that was shaved all around his crotch. They were both sexy. I have to say I found him more attractive than her.
I am bi and when I could, I sneaked looks at his dick and balls. He was circumcised and looked thick. I have often fantasized about being with a man like him.
The four of us wound up in the conversation pool talking when the sun went down and most people had left the pool area for dinner. They told us about good places in eat nearby and about some of the local sights. They told us about the javalena that sometimes come into the resort area in the evening.
I love taking pictures, and had my camera out at night taking pictures of the javelinas, the landscape, everything but the nude people at the resort. Taking pictures of them is, of course, forbidden. That night he brought over his camera and joined me in taking pictures of some of the amazing sights around the resort. Later he said he would like to get copies of some of my shots. I said "Sure."
The next day he brings a thumb drive when they come to the resort. He and I left our wives by the pool and went to the room where my wife and I were staying to transfer the images from my laptop to his thumb drive. Like just about everyone else, we were naked. I sat at a table in our room working the computer as he stood next to me, to my right.
I had never been alone with a naked sexy man like that, and I stole a couple glances at his cock. I think he noticed, and he moved close.
Meantime, his flash drive had a file labeled personal. I accidentally on purpose clicked on it, and up popped shots of Dave and his wife posing for the camera. They were clearly having sex and taking turns with the camera. He had an enormous erection.
All of this happened pretty quickly. But I looked at one amazing shot of him, and then up at him and just said "Wow, you are big! That's amazing."