Re: Two Submissives...No Sex
Try playing high-stakes poker. You could both write down on cards what you like, so you could write "oral sex for Mike", and she could write "oral sex for Louise" (or whatever your actual names are). Then you can put whatever you like on your cards, including such entries as "anal sex, Louise receiving", or "anal sex, Louise uses strapon", and she can put whatever she wants on her cards. You should review what's on the cards in advance, just so there's no unpleasant surprises when one of you puts down something the other one is really against. (If Louise is absolutely against receiving anal sex, maybe you don't make one of those.)
ANYWAY, you get all the cards for stuff she wants, and she gets all the cards for stuff you want, and you both play strip poker. You each have to ante up a card of the other person's chosen activities before a hand, and then you play by indicating which articles of clothing you'll put into the pot. The winner gets the pot, so the loser removes the article(s) of clothing he/she has lost for that round, plus the card. (Once an item is removed it may not be put back on.)
When somebody is naked, the game is over, and you can each cash in your cards. So if she put "half hour massage", and you anted it, and she won it, then you have to give her a half-hour massage. And if you put "strap-on sex", and she anted it, and you won, then she has to do that.
Alternatively, you might have it that the first one naked loses all their sexual favor cards as a penalty for losing, and so the winner gets whatever is on the cards they're holding but the loser gets only what the winner chooses to offer.