I have a few pictures I can dredge up to contribute. For now I'll just contribute a true hiking story.
An on duty park ranger friend of mine came across three skinny dipping couples in a waist deep pool in a creek. Five of the group got out of the water, but one modest guy stayed in. My ranger friend said the water was very clear- so the shy guy really wasn't hiding anything under that water. She assured the couples that it was OK for them to be there- and she said that if she wasn't on duty she would like to join them. They chatted a while longer, and then my friend said: "OK, have fun. I've got to get going." Then she shot an obvious glance into the water at the shriveled penis of the shy guy. She said: "Besides, your shy friend will be happy to see me go. That water
looks really cold!" The rest of his party -who could also see him clearly were rolling with laughter.
("The shrinkage! The shrinkage!" cried George Costanza.)