As you can tell from my photos, my cock and balls are nearly average sized, I think. I enjoy humiliation so I consider my average-ish size a disadvantage.
About 30 years ago while living in the mid-west, I frequented a very popular nude beach on a river. Mazo Beach, now defunct. It was very popular at the time. Canoes floating down the Wisconsin river, fishermen and just the curious resulted in quite a few voyeurs at the beach and all (except for a few very obnoxious types) were welcomed by the nude crowd. While it is difficult to be an exhibitionist at a nude beach, this did provide a some opportunities for me.
When I first started visiting the beach, I was shaving my cock and balls as a sign of submission and for humiliation. Have you ever slept with a woman for the first time and surprised her with your bald cock? In the early 90's shaving for men was quite unusual. I liked the women didn't like that kind of surprise and would leave me with no sex and blue balls. Most all of them told their friends, which resulted in giggling, smirks and insults when I 'just happened' to run into them.
One of the first things I noticed at the beach was that while quite a few women were shaved, I seemed to be the only bald cocked male. This had the wonderful effect of humiliation and effeminization... especially after I was hit on by several gay men and explained to them that I was straight (I enjoyed being hit on). A straight male with shaved balls was clearly submissive and the whole beach soon would whisper about me.
The water in river is cold year round. The cold water helped me out several times. I would spot a mixed group of voyeurs sitting near the beach and I would go play in the water for quite a while until I was pretty cold and my cock was shriveled up nice and small. Then I would carefully, slowly and deliberately walk out of the water headed directly towards the voyeurs. I would pretend not to really take notice of them, but was always thrilled to when the noticed my now incredibly tiny cock and balls. Some of the comments I heard were "Good thing he shaves or you'd never see it at all," "seven year old kids are bigger," "is that a clit?" "are you proud of that?" If they addressed me directly, I would stop and talk, agreeing that my cock was small and if a kind person suggested that it was shriveled because of the cold water, I would say "no, it's always like this."
I found that mixed groups insulted me and humiliated me the most. College age kids were good, usually being half drunk and pretty rowdy. The guys liked to show off to their girlfriends and making fun of my cock was one way to show off. The best groups would be couples in their 30's. They would be secure talking about sex and their insults would be more sophisticated. A group of 3 or 4 couples was ideal and I would spend an afternoon entertaining them, walking back and forth near them, laying down next to them with my cock as small as possible and chatting with them whenever possible.
One day I was surprised to see Jan, a neighbor of mine, at the beach. Jan was there with Connie, her sister-in-law, and they were both out for a peek at some cock. Neither got undressed and Jan was in shorts and a halter. I quickly got myself wet and, because it was in mid-May, the water was especially cold, which quickly got me small. When Jan got near, I walked out of the water and said "Oh hi, Jan. Good to see you here." At first Jan was a little embarrassed but Connie wasn't. We talked a while and I told Jan that I was a nudist and often was naked at home. As I started to warm up, my cock started to grow, so I said I wanted to go for a quick swim again. While I headed towards the water, I heard Connie say something like "little dick, huh?" and Jan giggled. After I got cold enough again, I got out of the water and walked back to Jan and Connie, with my little dick bobbing back and forth politely just like a two year old's cock. I again chatted with Jan for a while, then she said she had to go. I told her to stop over some time and we'd have coffee.