Aggression and expression are not antonyms. Your wife mutually agrees to accept your expression of love, and that’s great! If you express anger by punching her in the face, then you are an aggressor.

I think what Daniel means by “freedom of expression” is the freedom of someone to use their own body however they see fit. We don’t have to support this, and there’s nothing wrong with criticizing it, but to use violence (the State) to stop these actions is immoral.