Consent is sexy, of course. But why is it extra good, in hypnospaces?
I've always viewed hypnosis as a sort of a delicate dance. Hypnotist and subject working together to create an experience. Unless you're heavily practiced, it's often slowburn and encroaching instead of immediate as is often portrayed in the noncon stuff. True, absolute control is achieved when a person wants to be subjugated.
It also just feels better, deeper, even. Comfortable, soft hypnosis creates such a beautiful headspace for the people involved.
Or, imagine a negotiated cnc scene where the subject is made to put aside memories of doing so, convinced they're helpless. Suddenly, their hypnotist brings them up, memories rush back and they smile, blush, and laugh at their predicament just to be dropped as quickly as they rose. Or, perhaps, imagine a bratty subject cursing themselves for being so helpless to their hypnotist's triggers, something they knowingly agreed to and now too in it to stop. I LOVE that exertion of control it's so sexy.
Aha sorry for the short novel. I got a bit carried away.