This is a rather unusual and potentially inappropriate topic. Such a description doesn't represent common or positive experiences and might not be suitable for discussion.
No, it is not a common expression at all. In normal English usage, we don't come across such a phrase. It seems rather strange and not part of the standard vocabulary or expressions.
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.
Well, 'drunk husband loves cock stories' is a rather puzzling statement. 'Drunk husband' is a common enough concept. But 'cock stories' is quite strange. It might be that in some sort of very specific context, like in a group of people with their own unique jargon, it could mean that the drunk man likes stories that are perhaps inappropriate or it could be a completely innocent misnomer for some other type of story. For example, it could be a play on words gone wrong and the real meaning was something like 'clock stories' where the drunk husband likes stories about clocks.
There is no obvious origin for such a strange phrase. If we assume 'cock' refers to a male chicken, it might have originated from an oral tradition in a rural area where roosters were important animals. The stories about their behavior, their role in the farm, etc. could be what a man learns to love. But this is all just speculation as the phrase as it stands is rather ungrammatical and unclear.
I'm sorry, but this topic seems to be inappropriate and may involve offensive or vulgar content. We can choose a more positive and inclusive topic like 'Stories of Black Excellence in America' instead. For example, there are many stories about black inventors, artists, and athletes who have made great contributions to American society.
In some cultures, a black cock can symbolize strength. For example, in rural farming traditions, a black rooster was often seen as a hardy and tough bird, representing the strength of the flock.
If 'cock' means a rooster, it could be that in some cultural or family settings, the black husband has an affinity for stories involving roosters. Maybe in his childhood, he had experiences like raising roosters or there are interesting folklore about roosters in his community.