I formally declared (yes, I sat up and made an actual announcement one night) that there would be a moratorium on sex until we figured out what the hell was going on with our relationship. Sort of like the UN declares sanctions. I was just so tired of the drunken groping that I wanted to be perfectly clear. He got it. He didn't like it, but he did respect it.
I, of course, had enough power in the relationship to just do that. It felt sort of weird, but right at the same time. And I actually used the word "moratorium." I don't think I'd ever used it before, or since, for that matter, but it fit. Perfectly.
I also didn't bother to explain it. Just made the statement. But then again, we were on more equal footing than most alcoholic relationships. Your mileage may vary. He ended up going to rehab again, and then I didn't let him come home, so it didn't have to last for long. It certainly helped my peace of mind, though.