About you controlling his orgasm. If so, then you can - and he's probably hoping you will - use that power to get things you want. Have him earn his orgasm through chores and pampering, and bedroom service.
About him being locked. If so, then fun is to be had from the fact he can't get off, or even get his dick out. You don't actually have to unlock him to tease him. Just put on sexy clothing and let him pleasure you. For added points, have him wear a strapon to simulate normal sex - there's nothing quite so exquisitely frustrating. And of course there's sexting, little sexy tasks for him during the day, and - if it's his bag - tormenting him by making him wear panties and so on.
About you being penis-free. If so, enjoy getting what you want in bed without any effort on your part, and without the messy finish. Don't even let him mention his dick or his frustration. The effect on him will probably be the same as the previous option, but with less work for you.
And of course you can move between all three of these...
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