I can't think a specific scenario right now but if he wants to dominate in bed he Will do it. I imagine the first few times he is more conscious due to the inexperience so he mostly lets himself be guided by his partner, but once he feels more reassured he is able to take a lot of control of the situation when he feels like it, be it either in topping or bottoming, and he knows what to do or what to ask for from whoever he is with