Make him my live-in fuck buddy/domestic.
Basically, he'd clean house while I'm at work, then I'd come home and, like an eager puppy, he'd open the door and we'd start fucking, with me on top.
And when we're not fucking, he'd wear a leather chastity belt, just to keep him from pleasuring himself. Of course, it'd be assless, so I could still fuck him.
And whenever he's not fucking or doing the housework, he'd be working out to make his hot bod even bigger and stronger.
And sometimes, we'd fall asleep with my dick up his ass and me lying on top of him.
The relationship would be a mix of husband/wife, employer/domestic and lovers/dom-sub.