Very interesting!
I have one rooster like this; he runs his flock with his brother. He is absolutely in charge, there's no doubt about it with all the other interactions, although the two will happily sit together and preen each other. The alpha roo just has little/no reaction to seeing another rooster mating right in front of him, whether it's his brother, sons, or a totally different flock doing things. At most, if it's one of his favorite hens, he will saunter over and see if she's still in the mood. With young cockerels starting to behave inappropriately, he gets really confused and runs to the screaming hen but then seems to get stuck and do nothing. But, if the brother comes in and pushes or drags the cockerel away, alpha roo will immediately bop the brother if the cockerel screams about it...
So I now try to separate cockerels before it gets to that point. Meanwhile, this weird alpha boy is also the only rooster I have who will always and immediately go into insane fight mode with any predators or other threats, whether it's a hawk trying to break into the enclosure or a certain pair of fuzzy pink pants I made the mistake of wearing in there once.
