Why won't Yuno let Vasya castrate that rapist?! I mean, really. At least let Vasya cut off...

He doesnt really care about that, he just doesn’t want his family to put the blame on him again. He fears that they will come to Miami and either try to kill him or something else. Yuno just don’t want to take responsibility for something he didn’t do again

Complete castration would be ideal, imo. That's just my idea of justice for Yuno. However, I see how Yuno could be blamed. (Despite the fact the rapist convinced the fam Yuno seduced him. In which case, why would Yuno castrate the dick he supposedly loved? Blaming Yuno for the would-be castration only makes sense if the fam believes Yuno was raped, which they don't.) That's why I compromised and said take a nut! That's something the rapist would have to see every time he looks at his lecherous dick, but not something the family would see! Hopefully, the rapist would be too ashamed to tell the family (whom he deceived). In that way, Yuno and Vasya could bronze the severed nut, and do with it as they pleased and the cousin would be irreparably scarred from the incident, much like Yuno was from the rape. The rapist would still get away without retribution for the rape from the family, so hes still making out ahead, imo. Anyway, it's just a dream of vigilante justice.