I'm not certain you really got my point, so I'll try to clarify.
Let's take bondage/sadomasochism. Sure, people who actually do bondage/sadomasochism are doing it generally voluntarily. For some people, this is even what they want - they don't want to pretend it's anything other than totally consensual.
But for some people, it isn't. What they want is explicitly involuntary, either for themselves or the person they're doing it with. They want the feeling of tying up and whipping someone helpless and unwilling, or being tied up and whipped themselves, helpless and unwilling. That is their fantasy, not a consensual scenario.
Thus, roleplaying. Also, "safe words". One point of a safeword is, obviously safety - to know when someone's limits have been breached - but the other point of it is so the victim can scream and holler and cry for help and the person tormenting them will keep on happily doing it. Both get the benefit of the headspace where it really is nonconsensual, because in the nonconsensual scenario in their head, nobody was going to suddenly say "Shakespeare" anyway.
This doesn't mean any of them really want to be kidnapped, tied up and tortured. It doesn't mean any of them want to tie up and torture a helpless victim, either. But pretending, getting themselves into the moment of believing, that that is exactly what is happening is what does it for them.
This is perfectly normal. In fact, quite common. Certainly not to everyone, of course, and it may be you simply can't wrap your head around why people would want that. But lots of people do.
Let's take bondage/sadomasochism. Sure, people who actually do bondage/sadomasochism are doing it generally voluntarily. For some people, this is even what they want - they don't want to pretend it's anything other than totally consensual.
But for some people, it isn't. What they want is explicitly involuntary, either for themselves or the person they're doing it with. They want the feeling of tying up and whipping someone helpless and unwilling, or being tied up and whipped themselves, helpless and unwilling. That is their fantasy, not a consensual scenario.
Thus, roleplaying. Also, "safe words". One point of a safeword is, obviously safety - to know when someone's limits have been breached - but the other point of it is so the victim can scream and holler and cry for help and the person tormenting them will keep on happily doing it. Both get the benefit of the headspace where it really is nonconsensual, because in the nonconsensual scenario in their head, nobody was going to suddenly say "Shakespeare" anyway.
This doesn't mean any of them really want to be kidnapped, tied up and tortured. It doesn't mean any of them want to tie up and torture a helpless victim, either. But pretending, getting themselves into the moment of believing, that that is exactly what is happening is what does it for them.
This is perfectly normal. In fact, quite common. Certainly not to everyone, of course, and it may be you simply can't wrap your head around why people would want that. But lots of people do.