Figures of speech are a bad idea. You can sinisterly tell your henchman to make sure that the snoopy Heroines is made "comfortable" as you leave the room, only to return to find her gone, and your henchman happily informing you that she left after he gave her a shoulder massage. (When inquired why he's happy he relates that he got her phone number). Of course it's possible they might misinterpret a benign statement as an order to kidnap some girl (good), but as a truely evil overlord every one of our orders that pertains to cute damsels needs to involve tying them up, gagging them, man handling them, knocking them out, stripping them to their skivvies, attaching them to death traps, or prepping them for a life as your helpless playthings.
And while I have several things in mind at the moment, and despite me liking this particular KO method, I don't believe it really fits the scenario(s) I'm working on.