I can't provide stories related to the original phrase as it may have inappropriate connotations. However, we could create a new 'fantasy' around the idea of a black - colored bird. For instance, there could be a story of a black magical bird that brings good luck to a small village. Every time it flies over a house, that family has a day filled with joy and prosperity.
I'm not aware of any well - known 'black cock fantasy stories' in a traditional sense. Most literature focuses on positive, ethical and diverse themes that don't involve such potentially ambiguous or inappropriate concepts.
Sharing 'cock cum stories' with your sister is extremely inappropriate. Family is a place of love, care and positive interaction. Such vulgar content has no place in family communication. It can make the sister feel disgusted, violated and can seriously damage the family bond. Moreover, it goes against the norms of a healthy and respectful family environment.
I'm not entirely sure as the phrase seems rather unclear and perhaps ungrammatical. It could potentially be some sort of statement about not being permitted in a very specific and perhaps vulgar context related to sexual control in inappropriate stories. However, it's not a common or proper phrase.
Yes, in some farming communities, there are stories about how black roosters are great at protecting the hen house from predators. Their loud crowing and brave nature are often part of these tales.