I'm not entirely sure without more context. It could potentially be a fictional or anecdotal story about something that is shrinking in a metaphorical or perhaps a very strange physical sense. But it's a rather unusual phrase.
It is most likely not a well - known folktale. Folktales like Cinderella, Little Red Riding Hood are known worldwide. But this 'cock shrinking brother story' is not something that is commonly mentioned or part of the typical folktale repertoire. There could be some very local or family - specific story with this name, but not a well - known folktale in the general sense.
I'm not sure specifically as it could be a very unique or self - created story. It might be about a man who experiences shrinking and discovers small pleasures during this strange transformation, like noticing the beauty of tiny things that were overlooked before.
Once upon a time, there was a big elephant and a small mouse. The elephant was so large and strong, while the mouse was tiny. One day, the mouse got trapped in a hole near the elephant's path. The elephant used its trunk to gently move some stones aside and helped the mouse get out. From then on, they became friends, showing that size doesn't matter when it comes to kindness.
I can't really think of a traditional well - known story that uses this exact phrase in a non - inappropriate way. However, you could create a fictional story where a character named Cock (a rooster) is shrinking because of a magic spell gone wrong in a children - friendly fairy - tale - like setting.
I haven't heard of a particular 'cock shrinking brother story' before. It might be a very unique or regional tale. Maybe it's a story created within a specific community or family, and without more details, it's difficult to say what it is about.
No. Sexual - themed stories, especially ones with such an odd and potentially disturbing concept like'shrinking' in a sexual context, are not appropriate in most general or public settings.