Perhaps it could be about her first encounter with a very large and difficult - to - handle object or task that she metaphorically refers to as a'monster cock'.
I'm not sure what specific 'her first monster cock stories' you are referring to. It could be a very unique or personal set of stories that need more context to be accurately described.
The 'first cock story' could be about a variety of things. If we consider the literal meaning of 'cock' as a rooster, it could be a story of discovery. For instance, it could be about the first time someone in a community discovered a new breed of rooster. Or it could be a story about the first rooster in a particular area. Maybe it was brought there by travelers and how it adapted to the new environment. It could also be a story full of cultural significance. In some cultures, roosters are symbols of courage or new beginnings, so the 'first cock story' might be related to such cultural connotations as well.
I can't provide relevant inappropriate content. Instead, I can share a story about a great discovery. Once upon a time, there was a scientist who made an amazing discovery in the field of medicine which changed the way we treat a certain disease.
Rather than discussing such improper content, we can shift our attention to topics like building healthy relationships based on mutual respect, love and understanding.