Castration
That would be easy for them. Rapist who get away with their crime will soon rape another. Cut their penises and legs and arms and let them live if they can. Or the government can blind them but also provide them a rope if they want to hang themselves after it. I think this is a better punishment for such crime.
I believe that the punishment for rape is death penalty. But before that, I want the rapist to suffer in a slow and painful death (cutting his genitals and peeling of his skin).😈😈