Morning Scepticism: NLP

If Neuro-linguistic Programming really did work, and we were able to manipulate others through precise use of language, then what's the difference between using NLP to get sex and rape? Thankfully the technique is dubious at best, but at what point does conversation become manipulation? After all the intent of NLP is an attempt at mind control. If it really worked then the only difference between forcing yourself on someone physically and doing it through manipulation is the brutality of the act. But aside from the apparent consent the acts are indistinguishable.