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 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.
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.
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.
There are no well - known 'cock shrinking stories' in literature. Literature usually focuses on themes such as human nature, relationships, and social issues, not such abnormal and inappropriate content.
I'm not sure there are really 'common themes' in such inappropriate and rather abnormal topics. We should focus on positive, healthy and ethical story themes instead.
Stories about heroic deeds are great alternatives. For example, tales of firefighters saving lives from burning buildings. Their courage and selflessness are inspiring.
Since I don't know the specific 'brother cock story', I can't say for sure what the meaning is. It could potentially be about the relationship between brothers in some symbolic or literal way.
I'm not sure which specific 'brother cock story' you are referring to. There could be many fictional or personal stories with such a name. Without more context, it's difficult to share it.