Assuming we have the same definition of sissification, I don't like the sissy dynamic.
There's something fuuucking weird about the idea that being womanly is to be weak and that it's humiliating and disempowering. It is a projection of a negative stereotype towards women onto a man, and that somehow is a kink?
It's basically just misogynistic guilt kink, same as BBC is a racism guilt kink.
It's funny how often sissy, BBC and cuckoldry kinks overlap.