This is normal with male submissives alas. In general terms most- and I have had and encountered well over 100- are not fully submissive and like the idea of giving up control but insist on trying to top from the bottom.
In general female submissives are naturally submissive and their desire is to serve master or mistress's needs regardless of what they may be, whereas male submission invariably has the boy TELLING the mistress what he wants her to do to him. "Please mistress, I want you to turn me into a sissy. Please mistress I want you to spank my balls. Please mistress, I want you to tell me how pathetic I am. Please mistress, I want you to use your cock on me..." On the rare occasions the male actually asks the mistress what SHE would like to do to or with him, a response not to their liking solicits a "but mi-isss.... I don't like that".
Boys like to play at being the submissive but seldom actually relinquish control in a genuine way. I have seen many dommes who may as well have been on their pet's leash rather than the other way around. You have three options. 1- put up with it, 2- let him know that you're either his dom or you aren't but he needs to make that decision and stick with it, or 3- tell him no more. The second tends to work, but not overnight. You have to reprogramme a lot of years of sexual selfishness out of them, which takes time.
My husband still slips into that behaviour from time to time I'm sad to say, even to the point of throwing a strop if she doesn't get her own way, but one has to stand firm like one does with any other naughty child. One should certainly NEVER reward bad behaviour by giving them what they want, until they acknowledge their inappropriate attitude and attempt to correct it.
Also in regard to that 'I've been a naughty boy, spank me' plea, the answer should be NO. He craves to be spanked, it gives him pleasure, so it is a reward not a punishment. Tell him he can earn such rewards the same way the rest of grown up society has to earn theirs.
Lucie xoxo