It could include how you first saw the rooster. For example, you might say 'I first saw the cock in a small farmyard. It was standing on a fence post, looking so majestic.'
I'm sorry, but 'cock' can have inappropriate meanings in this context. I can't provide relevant stories. However, if 'cock' here refers to a rooster, my first encounter with a rooster was quite interesting. It was in a farm, and the rooster was strutting around proudly, with its bright feathers.
It could be that a group of friends went on a camping trip near a farm. One morning, they woke up to the sound of a very loud crowing. They went to investigate and found a huge rooster. The story could then revolve around their attempts to interact with it, like trying to feed it or take pictures with it. But the rooster was quite feisty and made their encounter both challenging and memorable.
Well, if'my first monster cock story' is a made - up or very specific story within a certain group or by an individual, I haven't heard of it. Maybe it's about an encounter with something large and strange in a fictional adventure? But again, this is just speculation without further details.
Another theme could be fear. Meeting something that is called a'monster' usually implies something scary, so fear of the unknown could be a big part of the story. Also, it could have a theme of discovery. Discovering this new and strange'monster cock' entity and learning about its nature and what it means in the context of the story.