You just have to be polite. You don't have to approve of castration yourself - you're welcome to your own opinion, after all. She might not take any particular notice of your opinion, but you can have it.
A talent you never knew you had.
I don't uderstand people who pay for vanilla sex. I mean, I go to a dominatrix, it's two hours of punishment and humiliation. A really rich, varied experience. Pay someone for straight sex and what have you got? Three seconds of fun, maybe four?
Chemical castration. Hmm. Not much fun for her, is it?