True. Everybody can do what they want. Been there, done that. I did not want to have sex with another woman while I enjoyed her freedom to be with other men for sex whenever she felt the urge. But actually it didn't play out like that. She said, she wouldn't want to be with another man when I was not there because she wanted it to be a couple experience and because it would feel like cheating to her if she would play on her own. I respected and accepted that and we had a great time of sharing many times. My point is: Not every partner has to follow the same "rules" to make it an equal-level arrangement or relationship because not every partner has the same desires. The most important thing is that both partner's ideas of a lifestyle match. And in some scenarios that can perfectly mean two partners assuming quite different roles.Of course he can, why should I do what I want and tell him hell no that's just selfish
As for the wording what is "allowed" or not I see it in context of a sexual roleplay in the realm of D/s or M/s play. In real life you cannot really disallow a partner to do something because if they want to they will do it anyway. But some folks are turned on by and get (sexually) off on the concept of control. It is but a kink. - Otherwise it would not even be a couple's lifestyle but an abusive relationship instead.