You have a way with words. I am going to assume you are talking about a callow young cockerel that is boorish but not dangerous.
In my experience, gentlemanly roos are naturally that way by virtue of their genes. They come from a line of gentleman roosters. However, some of the "polite" behavior that you desire can be disciplined into a receptive cockerel. There are a lot of very good articles and threads here on BYC on how to discipline manners into a cockerel. If you are consistent and firm with him when he gets out of line, he can learn proper manners.
An older rooster can teach a young cockerel a lot, too. I have two roosters, and the older one taught, and continues to discipline, his son how to behave properly around hens. Pop was a naturally born gentleman roo, but his son was not, although he has never been aggressive toward people. He's three now, and still fine-tuning his attitude toward the girls, and his pop occasionally needs to get tough on him when he's being rough with a hen.
To sum it up, this issue is complex. If you have a non-human aggressive cockerel, you can instill manners in him, and if you have a cooperating older rooster, he can help.
