Flashing in public, including at the beach, is not okay. It goes against the basic standards of propriety. We should respect the privacy and comfort of others. In a public place like a beach, people go to relax and enjoy the natural environment, not to be exposed to such inappropriate behavior.
Imagine Big Cock Beach was a beach that had a legend associated with it. The legend said that a big cock - like a magical creature - lived on this beach. Every year, during a certain full moon, the cock would turn the beach into a wonderland filled with colorful lights and beautiful music. A young girl, who was a curious traveler, heard about this legend and set out to find the beach. When she arrived on the full moon night, she witnessed the most amazing sight and learned that nature has many hidden and magical places.
One possible story could be that a sister was walking on the beach and she saw a beautiful rooster. She was amazed by its colorful feathers. She decided to follow it and it led her to a hidden part of the beach where she discovered an old treasure chest. The cock seemed to be guarding it in a way.
Well, this is a rather inappropriate and unethical situation. But if we were to find a moral, it could be about respecting others' boundaries and not engaging in vulgar or inappropriate behavior. It shows that such actions are unacceptable in a civilized society.
There could be a special type of plant that grows only on Big Cock Beach. It might be a plant that has adapted to the specific climate and soil conditions of this beach, with large leaves that provide shade for the small animals that live there.