You'd think they'd love it, because it offers them a culturally plausible excuse to explore their secret tastes. "It wasn't my fault, the hypnotist went off script, I was just there for a weight-loss programme!"

Of course, everyone knows that the dominance/kink community is extremely focused on consent and boundaries, so that excuse is pretty damn flimsy.

Also, if it worked that well, you'd think there would be a whole business model for the inverse model: masculinizing hypnosis for people who aren't confident in their identity, or as a product for conversion-therapy grift.