That's some fucked up shit right there.
Like, I don't kink shame, but there's a line. That line is where consent occurs, period. Someone that's drugged can't consent, and of equal importance, can't withdraw consent. So there's really no good way to explore that kink except by role play alone. Even that, you damn well don't do it without a shit ton of check ins.
But those shitstains? Like it or not, a partnership comes with a default assumption that you have each other's backs. You don't betray that, ever. Rape is bad enough. Drugging and raping your partner is stacking horror on horror in a way that makes me question my belief that the death penalty shouldn't exist. Some things are just so vile that anyone doing them can not be trusted to be anything other than vile in all ways.