Her being blackmailed, raped or unconscious is better than mind control or hypnosis. As they involve these little known things called choices and consequences. Mind control and hypnosis on the other hand are a total copout for people who can't write women. Why give her thoughts and reactions when you can just focus on him and his needs. Pretty gay if you ask me. Not to mention it's supernatural shit. These things don't exist IRL, meanwhile brainwashing does. But that takes time and effort and nobody ever wants to do that. Let alone watch it. Since it requires, I dunno, character development? It's lazy on both parts the writer and viewer.