Roosters are extremely interesting, entertaining, and unpredictable. At just under four months, your M. Maurice is only just beginning to discover his gender and experiencing the interesting consequences of burgeoning hormones which make roosters so interesting, entertaining, and unpredictable.
One thing most people with a new cockerel aren't aware of is how much their own behavior affects their adolescent roo. Understanding how those hormones can sometimes produce behaviors changes and even personality changes is helpful in raising a polite and well adjusted rooster.
The hormones cause a young cockerel to begin to experience their world differently. They become aware of the hens with a new interest. At the same time, they are viewing the rest of their world in a new dichotomy of trust and danger, but they won't have the experience until months later to be able to discern who and what they need to protect the hens from. Sometimes, they get very confused if new people suddenly appear, or their keeper engages in suddenly new behavior around him. This is when a formerly docile and friendly cockerel surprises everyone by being a jerk and a menace.
My advice is to be very consistent when you're around a young cockerel learning his new role in the flock. Keep his world as predictable and calm as possible. Limit visitors, especially small children over the next several months. Try not to engage in any sudden or threatening actions when near him. And most important, leave him alone to find his own way in relation to his flock except to guide him away from unacceptable behavior with consistent discipline. (Not punishment!)
Your relationship to your young developing roo should be one of dominance, yet you don't want to be interfering so much that you confuse and frustrate him. For example, you will try to ignore his clumsy, experimental attempts to mate, but you will discipline him if he tries to threaten you. You will expect him to move out of your way instead of you trying to dodge him. If he suddenly starts to come toward you with the typical rooster "dance", take that as a warning that he's beginning to get confused about his relationship with you. Don't turn your back on him; be aware of where he is at all times. If he does come up behind you and flings himself at you, you need to immobilize him until he calms down. That's about the only kind of discipline that will be necessary.
Last of all, be sympathetic in your understanding of how difficult it's going to be for M. Maurice over the next several months as he adjusts to all those crazy hormones that have changed how his world looks. Be confident you'll both survive until he's a grown-up at around one year.