As mentioned above, each Bull is different in this respect. In our experience, we have found Bulls to fall into one of two categories. 1. The Bull desires the wife to himself and will ask the cuck to leave the room while he takes the cuck's wife for himself. 2. The Bull enjoys humiliating the cuck in front of the cuck's wife. This is accomplished in many different ways, but the most common is to demand the cuck suck the Bull's cock as the wife watches, if the cuck gags on the Bull's cock the Bull seems to get that much more satisfying.
Of course, there are many variations to this and each Bull is unique and different in their approach and methods.
My wife met a new, young Bull from Russia back in the fall of last year and he has a very dominant personality both toward me and my wife. He likes for me to be in the room while he uses my wife for his pleasure but he requires I be fully dressed and remain a 6-foot distance from the side of the bed. On occasion, he will allow me to hold her hand while he is fucking her and she is ready to climax, but that is rare. On a few occasions, he has required me to strip naked so that he can engage in small penis humiliation while with my wife.