Chastity belt instead of prison for rapists?

Wouldn't this be a fairer solution? Something like this: https://www.amazon.com/Bondage-Shop4u-Male-Chastity-Belt-Cage/dp/B00BPN2C4I but more highly-secure. What are you thoughts? Would this help solve prison overcrowding? Would it allow the rapist to receive a deterrent punishment while avoiding getting institutionalized?

>>9

Because the main purpose of prison isn't to prevent future crime. It's punishment.

Only in subhuman countries.
In human countries, the primary purpose of punishment itself is deterrence. There, prisons have 3 purposes: deterrence, containment, and rehabilitation.

The idea of having the criminal suffer as revenge for misdeeds is characteristic of low IQ types, such as right wingers.